Increase time_out to 30 sec for failing int-tests

The test_get_configuration_details_from_instance_validation
tests were randomly timing out during certain int-test runs.
So the timeouts for these have been upped from 10s to 20s to
allow them to succeed more consistently.

Change-Id: I38451a2172397df9703e5fc90101d81c4fa953c4
Closes-Bug: #1326591
Merge "Increase time_out to 30 sec for failing int-tests"