Merge pull request #574 from jitsi/set_p2p_status

fix(JitsiConference): reduce verbosity level

JitsiConference.js

  */
 JitsiConference.prototype._setP2PStatus = function(newStatus) {
     if (this.p2p === newStatus) {
-        logger.error(`Called _setP2PStatus with the same status: ${newStatus}`);
+        logger.debug(`Called _setP2PStatus with the same status: ${newStatus}`);
 
         return;
     }