update package locations path in repo-build play
update package locations path in repo-build play

Repo build play fails or builds more packages than needed because
of the relative path in the package locations var. Updated the play
to use absolute paths.

Change-Id: If1064032b1d46413b7221c489c355b95106382b7

yanyao/openstack-ansible,cloudnull/os-ansible-deployment,robb-romans/openstack-ansible,BjoernT/openstack-ansible,os-cloud/os-ansible-deployment,BjoernT/os-ansible-deployment,openstack/openstack-ansible,yanyao/openstack-ansible,BjoernT/os-ansible-deployment,BjoernT/openstack-ansible,cfarquhar/openstack-ansible,cfarquhar/openstack-ansible,bunchc/openstack-ansible,openstack/openstack-ansible,bunchc/openstack-ansible,stackforge/os-ansible-deployment,stackforge/os-ansible-deployment,cloudnull/os-ansible-deployment,os-cloud/os-ansible-deployment,robb-romans/openstack-ansible,BjoernT/os-ansible-deployment