Inject ssrcs for receive-only endpoints by default. (#745)

Author: JonathanLennox

src/main/resources/reference.conf

@@ -159,7 +159,7 @@ jicofo {
 
     // Whether jicofo should inject a random SSRC for endpoints which don't advertise any SSRCs. This is a temporary
     // workaround for an issue with signaling endpoints for Octo.
-    inject-ssrc-for-recv-only-endpoints = false
+    inject-ssrc-for-recv-only-endpoints = true
 
     max-ssrcs-per-user = 20