Remove required-projects from job definition
Remove required-projects from job definition

Given that the parent is the functional job, which already
includes all the required roles, this is unnecessary and
only serves to slow down the test.

Change-Id: Iadcebc9eca9e279ea647a7a35bff5d00f82489f1

openstack/openstack-ansible-lxc_hosts,openstack/openstack-ansible-lxc_hosts