Extend AIO build timeout to 2.5hrs
Extend AIO build timeout to 2.5hrs

To help us get the rest of the python build simplification
work merged before we're able to remove the legacy parts,
we extend the timeout to the maximum allowed for the check
and gate pipelines in OpenStack-CI.

Change-Id: I976a7e242bcc18f77ce2ec88edcb43fb96f66c98

openstack/openstack-ansible,stackforge/os-ansible-deployment,stackforge/os-ansible-deployment,openstack/openstack-ansible