Merge branch 'va/p4-branch-import'

* va/p4-branch-import: git-p4: Add simple test case for branch import git-p4: Allow branch definition with git config git-p4: Allow filtering Perforce branches by user git-p4: Correct branch base depot path detection git-p4: Process detectCopiesHarder with --bool git-p4: Add test case for copy detection git-p4: Add test case for rename detection git-p4: Add description of rename/copy detection options git-p4: Allow setting rename/copy detection threshold