Fix following 3 test cases "should publish stream in room","should subscribe to stream in room","should allow showing a subscribed stream" fail issue
Fix following 3 test cases "should publish stream in room","should subscribe to stream in room","should allow showing a subscribed stream" fail issue

yangjinecho/licode,yangjinecho/licode,lodoyun/licode,MModal/licode,jcague/licode,conclave/licode,yangjinecho/licode,jcague/licode,conclave/licode,jcague/licode,MModal/licode,lodoyun/licode,MModal/licode,conclave/licode,conclave/licode,lynckia/licode,lodoyun/licode,jcague/licode,yangjinecho/licode,jcague/licode,MModal/licode,MModal/licode,conclave/licode,yangjinecho/licode,MModal/licode,lynckia/licode,lynckia/licode,conclave/licode,yangjinecho/licode,jcague/licode,lodoyun/licode,lodoyun/licode,lodoyun/licode,jcague/licode,conclave/licode,lodoyun/licode,yangjinecho/licode,lynckia/licode,lynckia/licode,MModal/licode,yangjinecho/licode,lynckia/licode,lynckia/licode