openstack-full: Using install_packages_disabled()
openstack-full: Using install_packages_disabled()

Since install_packages_disabled() exists, it make the code much more
smaller and easier to handle.

So this commit remove all the existing work about disabling services.

enovance/edeploy,redhat-cip/edeploy,lebauce/edeploy,lebauce/edeploy,lebauce/edeploy,enovance/edeploy,redhat-cip/edeploy,redhat-cip/edeploy,lebauce/edeploy,enovance/edeploy,enovance/edeploy,redhat-cip/edeploy