Windows: do not drop lock unnecessarily

Windows: do not drop lock unnecessarily

do not drop cm_serverLock for a cm_PutServer call since
it will only reacquire it.  use cm_PutServerNoLock() instead.

Reviewed-on: http://gerrit.openafs.org/5302
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Jeffrey Altman <jaltman@openafs.org>
Tested-by: Jeffrey Altman <jaltman@openafs.org>
(cherry picked from commit b804e027f1a9d8dfaad3d348390a83493b53a6c7)

Change-Id: Ic9c4f1550636555568e3c67b2bb5f9e772116e9f
Reviewed-on: http://gerrit.openafs.org/6798
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Derrick Brashear <shadow@dementix.org>