Disable mlockall by default.

Because we switched to R16 and it's known to cause problems.

Change-Id: I7546e2122ab7427d494a8556aa54f604efb8c152
Reviewed-on: http://review.couchbase.org/36285
Tested-by: Aliaksey Artamonau <aliaksiej.artamonau@gmail.com>
Reviewed-by: Aliaksey Kandratsenka <alkondratenko@gmail.com>

couchbase-server.sh.in

@@ -153,7 +153,7 @@ _start() {
         -ns_server config_path "\"@PREFIX@/etc/couchbase/static_config\"" \
         -ns_server pidfile "\"$PIDFILE\"" \
         -ns_server cookiefile "\"$COOKIEFILE-ns-server\"" \
-        -ns_server enable_mlockall ${COUCHBASE_ENABLE_MLOCKALL:-true}
+        -ns_server enable_mlockall ${COUCHBASE_ENABLE_MLOCKALL:-false}
 }
 
 _stop() {