Reset channel in pycue when setting host or facility (#222)

* Issue #220, call resetChannel when setting host or facility on opencue.Cuebot

pycue/opencue/cuebot.py

@@ -167,6 +167,12 @@ def closeChannel():
             del Cuebot.RpcChannel
             Cuebot.RpcChannel = None
 
+    @staticmethod
+    def resetChannel():
+        """Close and reopen the gRPC channel."""
+        Cuebot.closeChannel()
+        Cuebot.setChannel()
+
     @staticmethod
     def setFacility(facility):
         """Sets the facility to connect to. If an unknown facility is provided,
@@ -191,6 +197,7 @@ def setHosts(hosts):
             hosts = [hosts]
         logger.debug("setting new server hosts to: %s" % hosts)
         Cuebot.Hosts = hosts
+        Cuebot.resetChannel()
 
     @staticmethod
     def setTimeout(timeout):
@@ -199,7 +206,7 @@ def setTimeout(timeout):
         @type timeout: int
         """
         logger.debug("setting new server timeout to: %d" % timeout)
-        Cuebot.Timeout =  timeout
+        Cuebot.Timeout = timeout
 
     @classmethod
     def getProto(cls, name):