VarHandleKey: update hashed key if key was changed

Update the hashed key if the key name was changed after initialize has been called. Should give a minor performance improvement for this use-case. Also extend the unit test.

added full-unit-tests label

This merge request affects 1 package:

• Control/StoreGate

This merge request affects 2 files:

• Control/StoreGate/src/VarHandleKey.cxx
• Control/StoreGate/test/VarHandleKey_test.cxx

Adding @ssnyder as watcher

added Core main review-pending-level-1 labels

CI Result SUCCESS (hash 3cba6ad0)

	Athena	AthSimulation	AthGeneration	AthAnalysis
externals
cmake
make
tests

Full details available on this CI monitor view. Check the JIRA CI status board for known problems
Athena: number of compilation errors 0, warnings 0
AthSimulation: number of compilation errors 0, warnings 0
AthGeneration: number of compilation errors 0, warnings 0
AthAnalysis: number of compilation errors 0, warnings 0
For experts only: Jenkins output (remote access info)

Changes are fine and CI succeeds, approving for L1. -L1

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

merged

mentioned in commit d188560f