Increase connection_max_retries to 480 secs on CentOS jobs

Jobs run on non-nested virtualization environments (TCG) which
significantly slows down amphora instances at boot. CentOS-based
amphorae seem to take even longer for unknown reasons on TCG
environments. This patch increases connection_max_retries from default
300 seconds to 480 seconds on CentOS jobs.

Change-Id: Ib304cc12fcca51aab30f6dbe78ae412a8c358717
1 file changed