Extend FT timeout period
Extend FT timeout period

Some tests failed with a timeout the job
"tacker-functional-devstack-multinode-python3".

https://zuul.opendev.org/t/openstack/build/16ebf37575af4a70a4236a21a2aafc1d

This patch extends the timeout period of the job
to tenant max-job-timeout 10800 seconds (3 hours).

Change-Id: I9008a160901fecb7527adb3be9d5f318699315ef

stackforge/tacker,stackforge/tacker,openstack/tacker,openstack/tacker,openstack/tacker