Refine the r1349333 / r1349316 change with more idiomatic macro definitions.
Refine the r1349333 / r1349316 change with more idiomatic macro definitions.

* subversion/libsvn_fs_fs/fs_fs.c
  (RECOVERABLE_RETRY_LOOP): drop
  (RECOVERABLE_RETRY_TEST, RECOVERABLE_RETRY_NEXT): new macros
  (read_current, revision_proplist, get_and_increment_txn_key_body):
   use the new macros to guard retries

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