Don't strip leading slashes from CVS file paths.
Review Request #6029 — Created June 25, 2014 and submitted
Fetching CVS files requires the filenames to have the leading slashes intact.
This change adds anormalize_diff_filenamemethod to CVSDiffParser which
overrides the default behavior.
Ran unit tests.
Tool: Pyflakes Processed Files: reviewboard/scmtools/cvs.py Tool: PEP8 Style Checker Processed Files: reviewboard/scmtools/cvs.py