Fix bug in Quick Close Component merger

After [!24778 (merged)]

we see more fit failures i.e SPOT ttbar 12/07/2019

11:55:06 EMBremCollectionBuilder.GSFRefitterTool.GSFTrac...   INFO -----------------------------------------------
11:55:06 EMBremCollectionBuilder.GSFRefitterTool.GSFTrac...   INFO Number of Fit PrepRawData Calls:          0
11:55:06 EMBremCollectionBuilder.GSFRefitterTool.GSFTrac...   INFO Number of Fit MeasurementBase Calls:      4024
11:55:06 EMBremCollectionBuilder.GSFRefitterTool.GSFTrac...   INFO Number of Forward Fit Failures:           200
11:55:06 EMBremCollectionBuilder.GSFRefitterTool.GSFTrac...   INFO Number of Smoother Failures:              462
11:55:06 EMBremCollectionBuilder.GSFRefitterTool.GSFTrac...   INFO Number of MakePerigee Failures:           0
11:55:06 EMBremCollectionBuilder.GSFRefitterTool.GSFTrac...   INFO Number of Trks that fail fitquality test: 0

vs SPOT ttbar 11/07/2019

11:23:50 EMBremCollectionBuilder.GSFRefitterTool.GSFTrac...   INFO Number of Fit PrepRawData Calls:          0
11:23:50 EMBremCollectionBuilder.GSFRefitterTool.GSFTrac...   INFO Number of Fit MeasurementBase Calls:      4024
11:23:50 EMBremCollectionBuilder.GSFRefitterTool.GSFTrac...   INFO Number of Forward Fit Failures:           36
11:23:50 EMBremCollectionBuilder.GSFRefitterTool.GSFTrac...   INFO Number of Smoother Failures:              43
11:23:50 EMBremCollectionBuilder.GSFRefitterTool.GSFTrac...   INFO Number of MakePerigee Failures:           0
11:23:50 EMBremCollectionBuilder.GSFRefitterTool.GSFTrac...   INFO Number of Trks that fail fitquality test: 0

This is a fix, bringing in a "dropped" weights addition. Locally it seems to reduce them back to the previous situation

Mentioning @amorley (which should confirm it makes sense) and @jmitrevs

This merge request affects 1 package:

• Tracking/TrkFitter/TrkGaussianSumFilter

added Egamma Tracking master review-pending-level-1 labels

added bugfix label and removed Egamma Tracking master review-pending-level-1 labels

added Egamma Tracking master review-pending-level-1 labels

changed the description

changed the description

CI Result SUCCESS

	Athena	AthSimulation
externals
cmake
make
required tests
optional tests

Full details available at NICOS MR-24873-2019-07-14-08-17
Athena: number of compilation errors 0, warnings 0
AthSimulation: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST-CC7 1149]

approved this merge request

added review-approved label and removed review-pending-level-1 label

merged

mentioned in commit 2790a303

added sweep:ignore label

changed the description