MT#55283 redis: cover a usage of write DB with lock

Just cover it with already existing lock
used below, but move upper.

Fixes Covery Scan detected defect:

*** CID 1621443:  Concurrent data access violations  (MISSING_LOCK)
/daemon/redis.c: 2232 in json_restore_call()
2226                            call_destroy(c);
2227                    release_closed_sockets();
2228                    if (must_release_pop) // avoid deadlock with redis_notify->lock below
2229                            redis_ports_release_pop(false);
2230                    must_release_pop = false;
2231
>>>     CID 1621443:  Concurrent data access violations  (MISSING_LOCK)
>>>     Accessing "rtpe_redis_write->db" without holding lock "redis.lock".
>>>     Elsewhere, "redis.db" is written to with "redis.lock" held 1 out of 1 times.
2232                    redis_select_db(rtpe_redis_write, rtpe_redis_write->db);
2233
2234                    mutex_lock(&rtpe_redis_write->lock);
2235                    redisCommandNR(rtpe_redis_write->ctx, "DEL " PB, PBSTR(callid));
2236                    mutex_unlock(&rtpe_redis_write->lock);
2237

Change-Id: Iff3425451f82218480dcc08f42ea7bddbd6f672f

daemon/redis.c

@@ -2229,9 +2229,10 @@ static void json_restore_call(struct redis *r, const str *callid, bool foreign)
 			redis_ports_release_pop(false);
 		must_release_pop = false;
 
+		mutex_lock(&rtpe_redis_write->lock);
+
 		redis_select_db(rtpe_redis_write, rtpe_redis_write->db);
 
-		mutex_lock(&rtpe_redis_write->lock);
 		redisCommandNR(rtpe_redis_write->ctx, "DEL " PB, PBSTR(callid));
 		mutex_unlock(&rtpe_redis_write->lock);