ComponentAccumulator: Fix buggy exception messsage

ComponentAccumulator:

• Fix buggy exception messsage
• Fix failing unit tests in SCT_ConditionsTools and SiPropertiesTool

This merge request affects 3 packages:

• Control/AthenaConfiguration
• InnerDetector/InDetConditions/SCT_ConditionsTools
• InnerDetector/InDetConditions/SiPropertiesTool

Adding @oda ,@ssnyder ,@rbianchi as watchers

added Core InnerDetector master review-pending-level-1 labels

mentioned in merge request !22236 (merged)

mentioned in merge request !22219 (merged)

CI Result SUCCESS

	Athena	AthSimulation
externals
cmake
make
required tests
optional tests

Full details available at NICOS MR-22257-2019-03-29-17-44
Athena: number of compilation errors 0, warnings 0
AthSimulation: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST 36228]

Approving. Clara (L1)

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

merged

mentioned in commit 6fb5e292

added sweep:ignore label