Bump job timeout for windmill buildimages to 60
Bump job timeout for windmill buildimages to 60

Since we are doing a lot of IO in our jobs, bump to 60 just to be
safe for our slower clouds.

Change-Id: I1180301c7c814245bf85919410172f2c4aab9f6c
Signed-off-by: Paul Belanger <e7139c8e6c4ea75cc1c287ce081b2dc0f3ab39ec@redhat.com>

openstack-infra/project-config,openstack-infra/project-config