linter fixes

Author: Pearl1594

scripts/vm/hypervisor/xenserver/xenserver84/vmopspremium

@@ -1,14 +1,14 @@
-#!/usr/bin/env python3
+#!/usr/bin/python
 # Licensed to the Apache Software Foundation (ASF) under one
 # or more contributor license agreements.  See the NOTICE file
 # distributed with this work for additional information
 # regarding copyright ownership.  The ASF licenses this file
 # to you under the Apache License, Version 2.0 (the
 # "License"); you may not use this file except in compliance
 # with the License.  You may obtain a copy of the License at
-# 
+#
 #   http://www.apache.org/licenses/LICENSE-2.0
-# 
+#
 # Unless required by applicable law or agreed to in writing,
 # software distributed under the License is distributed on an
 # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
@@ -18,7 +18,7 @@
 
 # Version @VERSION@
 #
-# A plugin for executing script needed by vmops cloud 
+# A plugin for executing script needed by vmops cloud
 
 import os, sys, time
 import XenAPIPlugin
@@ -133,17 +133,17 @@ def setup_heartbeat_file(session, args):
         txt = ''
     return txt
 
- 
+
 @echo
 def heartbeat(session, args):
     host = args['host']
     timeout = args['timeout']
     interval = args['interval']
-    try: 
-       cmd = ["/bin/bash", "/opt/cloud/bin/launch_hb.sh", host, timeout, interval]
-       txt = util.pread2(cmd)
+    try:
+        cmd = ["/bin/bash", "/opt/cloud/bin/launch_hb.sh", host, timeout, interval]
+        txt = util.pread2(cmd)
     except:
-       txt='fail'
+        txt='fail'
     return txt
 
 @echo