ceilometer: increase timeout of integration job
ceilometer: increase timeout of integration job

The current timeout is too low, when the heat stack creation time fail
the job timeout is reach before the test timeout.

And we didn't get the devstack logs of failing tests.

Change-Id: Id43ed15fb02559aaf043cc1c65237c96205f01ed

noorul/os-project-config,openstack-infra/project-config,openstack-infra/project-config,Tesora/tesora-project-config,dongwenjuan/project-config,Tesora/tesora-project-config,dongwenjuan/project-config,noorul/os-project-config