also catch RpcError

inventory_provider/juniper.py

@@ -115,7 +115,7 @@ def _rpc(hostname, ssh):
         ssh_private_key_file=ssh['private-key'])
     try:
         dev.open()
-    except EzErrors.ConnectError as e:
+    except [EzErrors.ConnectError, EzErrors.RpcError] as e:
         raise ConnectionError(str(e))
     return dev.rpc