jitsi_meet: use domain param

tracim/tracim/controllers/root.py

         fake_api = Context(CTX.CURRENT_USER).toDict({'current_user': current_user_content})
         room = 'test'
         token = JitsiMeetRoom.generate_token(room)
+        domain = JitsiMeetRoom.domain
 
         return DictLikeClass(fake_api=fake_api,
                              token=token,
-                             room=room)
+                             room=room,
+                             domain=domain)

tracim/tracim/lib/jitsi_meet/jitsi_meet.py

 
 import jwt
 
-JITSI_URL = "https://prosody"
+JITSI_DOMAIN = "prosody"
 JWT_APP_ID = "test"
 JWT_SECRET = "secret"
 JWT_ALG = 'HS256'
 class JitsiMeetRoomHandler:
 
     def __init__(self,
-                 base_url: str,
+                 domain: str,
                  token_config: typing.Optional[JitsiTokenConfig],
                  ) -> None:
-        self.base_url = base_url
+        self.domain = domain
         self.token_config = token_config
 
     def generate_token(self, room: str)->str:
         """
         if self.token_config:
             token = self.generate_token(room)
-            url = "{}/{}?jwt={}".format(JITSI_URL,
+            url = "{}/{}?jwt={}".format(self.domain,
                                         room,
                                         token,)
         else:
-            url = "{}/{}".format(JITSI_URL,
+            url = "{}/{}".format(self.domain,
                                  room,)
-        return url
+        return "https://{}".format(url)
 
 if JITSI_USE_TOKEN:
     defaultTokenConfig = JitsiTokenConfig(
     defaultTokenConfig = None
 
 JitsiMeetRoom = JitsiMeetRoomHandler(
-    base_url=JITSI_URL,
+    domain=JITSI_DOMAIN,
     token_config= defaultTokenConfig
 )
 

tracim/tracim/templates/videoconf.mak

         // It support alls jitsi-meet features.
         // About support for "private (1-to-1) text message into room", check this :
         // https://github.com/jitsi/lib-jitsi-meet/pull/616
-        var domain = "prosody";
+        var domain = '${domain}';
         var options = {
 	    // jitsi-meet support now(10-2017) only one way to auto-auth, token,
 	    // which is anonymous BOSH auth with specific url (with token value in params of the url).