In libsvn_ra_serf: following up on r1066917 and r1553341, stop resetting
the connection while looking for a vcc url because we assume serf blocks
the connection from further use, as it no longer does that on these error
conditions.

* subversion/libsvn_ra_serf/util.c
  (svn_ra_serf__discover_vcc): Remove now unnecessary connection reset.


git-svn-id: https://svn.apache.org/repos/asf/subversion/trunk@1553343 13f79535-47bb-0310-9956-ffa450edef68