Implement test by URL for webrtc load test #509

Job	Run time
loadtester docker image	4m 20s
loadtester docker image	4m 20s
webrtc-load-tester docker image	3m 55s
webrtc-load-tester docker image	3m 55s
record-tester docker image	4m 15s
record-tester docker image	4m 15s
orch-tester docker image	30m 48s
orch-tester docker image	30m 51s
streamtester docker image	10m 22s
streamtester docker image	10m 22s
	1h 47m 23s

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