release-tool: improve git path searches in select-test-suite
release-tool: improve git path searches in select-test-suite

try out some known paths like the rest of the commands do.

changelog: none

Signed-off-by: Marcin Chalczynski <c518ef63bd173fb6889b2878cfc53cf2b95e88ef@gmail.com>

pasinskim/integration,pasinskim/integration,pasinskim/integration