Increase timeout for Ambari server setup

The setup might take more then 5 minutes (current limit) if JRE is not
pre-installed on the image and the Internet connection is slow. This
change increases the timeout to half an hour.

Partially fixes bug #1259836

Change-Id: I41279f965c5e7d8c41e1edb800b3e62d38537bb7
Merge "Increase timeout for Ambari server setup"