ra_serf: Remove code duplication.
ra_serf: Remove code duplication.

* subversion/libsvn_ra_serf/property.c
  (retrieve_baseline_info): New. Extracted from 
   svn_ra_serf__get_baseline_info.
  (svn_ra_serf__get_baseline_info): Use retrieve_baseline_info.

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