Merge branch 'pw/git-p4-tests'

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