Clean up FSX pack tests.  Use a centralized check to skip these tests for non-FSX repositories.  Also, drop unnecessary version checks that were carried over from FSFS, i.e. dead code.
Clean up FSX pack tests.  Use a centralized check to skip these
tests for non-FSX repositories.  Also, drop unnecessary version
checks that were carried over from FSFS, i.e. dead code.

* subversion/tests/libsvn_fs_x/fs-x-pack-test.c
  (create_packed_filesystem): Skip tests for pre-1.9 compat or
                              non-FSX repositories.
  (pack_even_filesystem,
   read_packed_fs,
   commit_packed_fs,
   get_set_revprop_packed_fs,
   get_set_large_revprop_packed_fs,
   get_set_huge_revprop_packed_fs,
   recover_fully_packed,
   file_hint_at_shard_boundary,
   test_reps,
   pack_shard_size_one): Remove local test compat check.
  (pack_filesystem,
   test_info): Ditto.  Also, remove dead code.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@1547465 13f79535-47bb-0310-9956-ffa450edef68

YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion