Plugin timeout too short

[rguhr]

The hardcoded timeout of 3 seconds is much too short for production environments. We run this script towards our vCenter to scan all esxi nodes. But the whole process (get and parse the answer from the vCenter) needs more than 3 seconds. I heard the normal timeout of nagios plugin should be around 30 seconds.

ToDos:

• The default timeout $TIMEOUT should increase to 30 seconds
• The timeout should be controllable via command argument (so users can define their own timeouts depending on their environments)