Only delete proxy-repo if exists

Signed-off-by: Alin Dreghiciu <adreghiciu@gmail.com>
Handle a null returned by getTestResourceAsFile() (when file does not exist)

Signed-off-by: Alin Dreghiciu <adreghiciu@gmail.com>
Merge remote-tracking branch 'origin/unify-test-resources-dir' into unify-test-resources-dir-move-files