Unit tests fixes and log improvements

[peter-quix]

• Fix unit tests in python and c# to consistently pass. (including a fix for Daylight saving time or other than UTC breaks unit tests #76)
• Disable unit tests for now that are expected to fail in python
• Log a warning instead of throwing an exception when subscribing multiple times as this is not a catastrophic issue, but one the user should not perform unnecessarily as a hint at a code issue
• Improved the log checker for InteropGenerator to give partial results rather than crash
• When TimeseriesData (not the Raw variant, which is used for pandas in python) is used with multiple data types, it threw an exception. Now it will log a warning and use the type already in the dictionary instead.