Merge branch 'pw/git-p4-tests'

More "git p4" tests. * pw/git-p4-tests: git p4 test: fix badp4dir test git p4 test: split up big t9800 test git p4 test: cleanup_git should make a new $git git p4 test: copy source indeterminate git p4 test: check for error message in failed test git p4 test: rename some "git-p4 command" strings git p4 test: never create default test repo git p4 test: simplify quoting involving TRASH_DIRECTORY git p4 test: use real_path to resolve p4 client symlinks git p4 test: wait longer for p4d to start and test its pid