Feat CCT-965: Include timezone in the logs

In `subscription-manager/src/rhsm/logutil.py`i:

* New loggin formater class `RhsmISO8601Formatter` was made
to ensure that time stamp entry is in ISO-8810 format and
that it contains info about milliseconds and time zone.

* Then variable `LOG_FORMATTER` is made and `RhsmISO8601Formatter(LOG_FORMAT)`
is assigned to it. Then distributed to places where `.setFormatter(Formatter(LOG_FORMAT, ...))` occured.

CARD CCT-965

src/rhsm/logutil.py

@@ -10,20 +10,13 @@
 
 from typing import Optional, Tuple, Union, List
 
+import datetime
 import logging
 import logging.handlers
 import logging.config
 import os
 import sys
 import rhsm.config
-import datetime
-
-
-class RhsmISO8601Formatter(logging.Formatter):
-    """Ensure date & time to be in ISO8601 format and containing info about milliseconds and time zone"""
-
-    def formatTime(self, record, datefmt=None):
-        return datetime.datetime.fromtimestamp(record.created).astimezone().isoformat(timespec="milliseconds")
 
 
 LOGFILE_DIR = "/var/log/rhsm/"
@@ -39,8 +32,6 @@ def formatTime(self, record, datefmt=None):
     "%(threadName)s @%(filename)s:%(lineno)d - %(message)s"
 )
 
-LOG_FORMATTER = RhsmISO8601Formatter(LOG_FORMAT)
-
 _rhsm_log_handler: Optional["RHSMLogHandler"] = None
 _subman_debug_handler: Optional["SubmanDebugHandler"] = None
 log: Optional[logging.Logger] = None
@@ -155,6 +146,15 @@ def __init__(self, name) -> None:
         self.setLevel(self.level)
         self.addFilter(PyWarningsLoggingFilter(name="py.warnings"))
 
+class RhsmISO8601Formatter(logging.Formatter):
+    """Ensure date & time to be in ISO8601 format and containing info about milliseconds and time zone"""
+
+    def __init__(self):
+        super().__init__(fmt=LOG_FORMAT)
+
+    def formatTime(self, record, datefmt=None):
+        return datetime.datetime.fromtimestamp(record.created).astimezone().isoformat(timespec="milliseconds")
+
 
 def _get_default_rhsm_log_handler() -> (
     Tuple[Union[logging.handlers.RotatingFileHandler, logging.StreamHandler], Optional[str]]
@@ -163,15 +163,15 @@ def _get_default_rhsm_log_handler() -> (
     error: Optional[Exception] = None
     if not _rhsm_log_handler:
         _rhsm_log_handler, error = RHSMLogHandler(LOGFILE_PATH, USER_LOGFILE_PATH)
-        _rhsm_log_handler.setFormatter(LOG_FORMATTER)
+        _rhsm_log_handler.setFormatter(RhsmISO8601Formatter())
     return _rhsm_log_handler, error
 
 
 def _get_default_subman_debug_handler() -> Union[None, "SubmanDebugHandler"]:
     global _subman_debug_handler
     if not _subman_debug_handler:
         _subman_debug_handler = SubmanDebugHandler()
-        _subman_debug_handler.setFormatter(LOG_FORMATTER)
+        _subman_debug_handler.setFormatter(RhsmISO8601Formatter())
     return _subman_debug_handler