Handle None values in DBInserter

[robertdstein]

np.unique cannot deal with None, so swap to pd.unique.

Also implement weighting for ra/dec in WINTER source table.

Also also add WINTER configuration for full_subset, which is just full but for one board.

[coveralls]

Pull Request Test Coverage Report for Build 7996823094

Details

• 25 of 37 (67.57%) changed or added relevant lines in 6 files are covered.
• 1 unchanged line in 1 file lost coverage.
• Overall coverage decreased (-0.06%) to 86.374%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
mirar/pipelines/winter/generator.py	8	20	40.0%

Files with Coverage Reduction	New Missed Lines	%
mirar/monitor/base_monitor.py	1	83.0%

Totals
Change from base Build 7980158652:	-0.06%
Covered Lines:	10085
Relevant Lines:	11676

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💛 - Coveralls