SN Update EQM config

[sarahgonicholson]

• Update the config file submitr/config/custom_column_mappings.json to include properties for DSA as well as DuplexSeq ExternalQualityMetric items
• Fix handling of empty properties in ExternalQualityMetric spreadsheets
• Update the handling of CUSTOM_COLUMN_MAPPINGS_LOCAL to use the local version of custom_column_mappings in submitr (rather than in dcicutils/submitr) when set to True to help with testing

NOTE: This is a temporary fix to allow submission of DSA_ExternalQualityMetric submission spreadsheets with submitr. Ideally, we would like to have this functionality moved over to submitr and have the config information pulled from the portal with a query to search/?type=GenericQcConfig&tags=external_quality_metrics, with the first returned item in search being the most recent version of the config. This may require moving submitr/custom_excel.py over to submitr as well.

[coveralls]

Pull Request Test Coverage Report for Build 16912433301

Details

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 75.375%

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Totals
Change from base Build 13998979386:	0.0%
Covered Lines:	11454
Relevant Lines:	15196

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💛 - Coveralls