Let must_(un)lock write to the logger before they abort
Let must_(un)lock write to the logger before they abort

Change-Id: I2a2acd6c521c9d01d645f5ad6fc304fb3a388b94
Reviewed-on: http://review.membase.org/6483
Reviewed-by: Dustin Sallings <1c08efb9b3965701be9d700d9a6f481f1ffec3ea@spy.net>
Tested-by: Trond Norbye <60edd2ef23891a753f231b0c6f161dc634079a93@gmail.com>

membase/bucket_engine,couchbase/bucket_engine,couchbase/bucket_engine,couchbase/bucket_engine,membase/bucket_engine,membase/bucket_engine,couchbase/bucket_engine,membase/bucket_engine