wikitech: do not include sudoers::labs_project via ldap

This change can be merged after
I22571a240d5e754bb24e8809db569dd7aa6b68af has been merged - that will
make the role::instance::labs class include sudoers::labs_project directly

Change-Id: I7e2a7785b5a3081e201b3cb9c1164a42cb964a5f
Merge "wikitech: do not include sudoers::labs_project via ldap"