Import MeasuredData through ert

The ert import structure is going to change to conform to pep8's
"modules should explicitly declare the names in their public API using
the __all__ attribute. [...] Other modules must not rely on indirect
access to such imported names unless they are an explicitly documented
part of the containing module's API, such as os.path".

semeio/workflows/correlated_observations_scaling/cos.py

@@ -4,7 +4,7 @@
 import yaml
 import configsuite
 
-from ert_data.measured import MeasuredData
+from ert import MeasuredData
 from ert_shared.libres_facade import LibresFacade
 from ert_shared.plugins.plugin_manager import hook_implementation
 from semeio.communication import SemeioScript

semeio/workflows/misfit_preprocessor/misfit_preprocessor.py

@@ -1,6 +1,6 @@
 import yaml
 
-from ert_data.measured import MeasuredData
+from ert import MeasuredData
 from ert_shared.libres_facade import LibresFacade
 from ert_shared.plugins.plugin_manager import hook_implementation
 

semeio/workflows/spearman_correlation_job/spearman_correlation.py

@@ -1,6 +1,6 @@
 import argparse
 
-from ert_data.measured import MeasuredData
+from ert import MeasuredData
 from ert_shared.libres_facade import LibresFacade
 from ert_shared.plugins.plugin_manager import hook_implementation
 from semeio.communication import SemeioScript