* adds env-based integration test controls
Some integration tests were running locally without being told
to do so via env variables. This adds some controllers for validating
if and when those tests should run, and for ensuring the env
variables necessary to run the test are available.
* testing helper comments, func name change
* add testing timeOf log, skip gc ci tests
* corrected the test skip in GC_test
* update kopia_test with helpers
* rename /testing files to *_test.go
This will ensure these files do not compile into the release binary.
* Revert "rename /testing files to *_test.go"
This reverts commit 04fd2046cc6d11bf3e3eb98d98a3e84b1bba6366.
44392ab8b2