clean up /tmp after tests
clean up /tmp after tests

[#97550154]

Signed-off-by: Chris Walter <fe90a72e4e086d6063a97710fdb1d465540f326a@pivotal.io>

pivotaltracker/git-branches-resource,zachgersh/git-resource,concourse/git-resource,starkandwayne/git-multibranch-resource,barthy1/git-resource,StartupMakers/ssh-resource,ivojinovic/pipeline-git-branch-resource