AthenaConfiguration: Allow overriding the location of test files.

Allow overriding the location of test files via an optional environment variable. Useful for builds on systems where cvmfs is not available.

This merge request affects 1 package:

• Control/AthenaConfiguration

Adding @ssnyder as watcher

added Core master review-pending-level-1 labels

CI Result SUCCESS

	Athena	AthSimulation
externals
cmake
make
required tests
optional tests

Full details available at NICOS MR-20164-2019-01-04-01-28
Athena: number of compilation errors 0, warnings 0
AthSimulation: number of compilation errors 0, warnings 0
For experts only: Jenkins output [CI-MERGE-REQUEST 31922] (for remote access see the FAQ for MR reviewers)

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

merged

mentioned in commit 5a9a2645

added sweep:ignore label