Reject git diff filenames with absolute path

Review Request #9512 — Created Jan. 20, 2018 and updated — Latest diff uploaded

Information

Review Board
release-2.0.x
3c76a5c...

Reviewers

Filenames in git diff files should be relative path and not
absolute path. This EasyFix raises an error when an
absolute path is detected.

Added unit test to test parsing Git diff with absolute file names
All tests passed in reviewboard.scmtools.tests.test_git:GitTests