Rename and rework merge_tests.py 52 in light of the fix for issue #3029.
Rename and rework merge_tests.py 52 in light of the fix for issue #3029.

Note: This test still fails due to issue #2877, but once that is fixed it
will no longer fail for other reasons which are no longer valid.

* subversion/tests/cmdline/merge_tests.py
  (empty_rev_range_mergeinfo): Rename this...
  (empty_mergeinfo) ...to this.  Don't expect propset or merge to result in
  mergeinfo with paths mapped to empty ranges any more, the fix for
  issue #3029 did away with these.
  (test_list): Upate with the test's new name.

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion