Fix metadata formatting workarounds on the server

As described in e-mission/cordova-usercache#17, it
looks like we never actually passed in a timezone from the client, which means
that the code to check for timezone validity was never tested.

And of course, that which is not tested is broken. Fix the check by adding
appropriate imports and module names.

With this change, we now store the incoming config

```
2016-07-25 15:28:17,503:DEBUG:module_name = emission.net.usercache.formatters.ios.consent
2016-07-25 15:28:17,555:DEBUG:write_ts = 1469477974
2016-07-25 15:28:17,556:DEBUG:insert called
2016-07-25 15:28:17,556:DEBUG:entry was fine, no need to fix it
2016-07-25 15:28:17,557:DEBUG:Inserting entry AttrDict({u'user_id': UUID('0763de67-f61e-3f5d-90e7-518e69793954'), u'_id': ObjectId('57969202115514afcd79338b'), u'data': AttrDict({u'category': u'emSensorDataCollectionProtocol', u'approval_date': u'2016-07-14', u'protocol_id': u'2014-04-6267'}), u'metadata': AttrDict({u'platform': u'ios', 'write_local_dt': LocalDate({'hour': 13, 'month': 7, 'second': 34, 'weekday': 0, 'year': 2016, 'timezone': u'America/Los_Angeles', 'day': 25, 'minute': 19}), u'read_ts': 0, u'key': u'config/consent', u'plugin': u'none', u'write_ts': 1469477974, u'type': u'rw-document', u'time_zone': u'America/Los_Angeles', 'write_fmt_time': '2016-07-25T13:19:34-07:00'})}) into timeseries
```

and return it as a document.

```
2016-07-25 15:28:45,014:DEBUG:finished querying values for ['config/consent']
2016-07-25 15:28:45,014:DEBUG:finished querying values for []
2016-07-25 15:28:45,015:DEBUG:Found 2 user overrides for user 0763de67-f61e-3f5d-90e7-518e69793954
2016-07-25 15:28:45,015:DEBUG:last entry is Entry({u'user_id': UUID('0763de67-f61e-3f5d-90e7-518e69793954'), u'_id': ObjectId('57969202115514afcd79338b'), u'data': {u'category': u'emSensorDataCollectionProtocol', u'approval_date': u'2016-07-14', u'protocol_id': u'2014-04-6267'}, u'metadata': {u'write_fmt_time': u'2016-07-25T13:19:34-07:00', u'write_ts': 1469477974, u'plugin': u'none', u'time_zone': u'America/Los_Angeles', u'platform': u'ios', u'write_local_dt': {u'hour': 13, u'month': 7, u'second': 34, u'weekday': 0, u'year': 2016, u'timezone': u'America/Los_Angeles', u'day': 25, u'minute': 19}, u'key': u'config/consent', u'read_ts': 0, u'type': u'rw-document'}})
2016-07-25 15:28:45,015:DEBUG:for 0763de67-f61e-3f5d-90e7-518e69793954, config is Consentconfig({u'category': u'emSensorDataCollectionProtocol', u'approval_date': u'2016-07-14', u'protocol_id': u'2014-04-6267'})
2016-07-25 15:28:45,016:DEBUG:Result = {'updatedExisting': False, u'nModified': 0, u'ok': 1, u'upserted': ObjectId('5796929d115514afcd793398'), u'n': 1} after updating document config/consent
```

emission/net/usercache/formatters/android/consent.py

@@ -15,7 +15,7 @@ def format(entry):
     metadata = entry.metadata
     try:
         valid_tz = pytz.timezone(entry.metadata.time_zone)
-    except UnknownTimeZoneError, e:
+    except pytz.UnknownTimeZoneError, e:
         logging.warn("Got error %s while checking format validity" % e)
         # Default timezone in for the Bay Area, which is probably a fairly safe
         # assumption for now

emission/net/usercache/formatters/android/sensor_config.py

@@ -15,7 +15,7 @@ def format(entry):
     metadata = entry.metadata
     try:
         valid_tz = pytz.timezone(entry.metadata.time_zone)
-    except UnknownTimeZoneError, e:
+    except pytz.UnknownTimeZoneError, e:
         logging.warn("Got error %s while checking format validity" % e)
         # Default timezone in for the Bay Area, which is probably a fairly safe
         # assumption for now

emission/net/usercache/formatters/android/sync_config.py

@@ -15,7 +15,7 @@ def format(entry):
     metadata = entry.metadata
     try:
         valid_tz = pytz.timezone(entry.metadata.time_zone)
-    except UnknownTimeZoneError, e:
+    except pytz.UnknownTimeZoneError, e:
         logging.warn("Got error %s while checking format validity" % e)
         # Default timezone in for the Bay Area, which is probably a fairly safe
         # assumption for now

emission/net/usercache/formatters/ios/consent.py

@@ -1,6 +1,8 @@
+import logging
 import copy
+import pytz
 
-import emission.core.wrapper.syncconfig as ecws
+import emission.core.wrapper.consentconfig as ecws
 import emission.net.usercache.formatters.common as fc
 
 # Currently, we just reflect this back to the user, so not much editing to do
@@ -12,7 +14,7 @@ def format(entry):
     metadata = entry.metadata
     try:
         valid_tz = pytz.timezone(entry.metadata.time_zone)
-    except UnknownTimeZoneError, e:
+    except pytz.UnknownTimeZoneError, e:
         logging.warn("Got error %s while checking format validity" % e)
         # Default timezone in for the Bay Area, which is probably a fairly safe
         # assumption for now

emission/net/usercache/formatters/ios/sensor_config.py

@@ -15,7 +15,7 @@ def format(entry):
     metadata = entry.metadata
     try:
         valid_tz = pytz.timezone(entry.metadata.time_zone)
-    except UnknownTimeZoneError, e:
+    except pytz.UnknownTimeZoneError, e:
         logging.warn("Got error %s while checking format validity" % e)
         # Default timezone in for the Bay Area, which is probably a fairly safe
         # assumption for now

emission/net/usercache/formatters/ios/sync_config.py

@@ -1,4 +1,6 @@
+import logging
 import copy
+import pytz
 
 import emission.core.wrapper.syncconfig as ecws
 import emission.net.usercache.formatters.common as fc
@@ -12,7 +14,7 @@ def format(entry):
     metadata = entry.metadata
     try:
         valid_tz = pytz.timezone(entry.metadata.time_zone)
-    except UnknownTimeZoneError, e:
+    except pytz.UnknownTimeZoneError, e:
         logging.warn("Got error %s while checking format validity" % e)
         # Default timezone in for the Bay Area, which is probably a fairly safe
         # assumption for now