suite.placeholder: Speed up ansible.cephlab

By skipping the tags "user,pubkeys,nagios,nrpe" we can save ~3min per
job, assuming users won't need to ssh in to a testnode while a job is
running - which is probably very close to 100% of jobs.

Signed-off-by: Zack Cerza <[email protected]>

Author: zmc

teuthology/suite/placeholder.py

@@ -58,6 +58,9 @@ def _substitute(input_dict, values_dict):
         'admin_socket': {
             'branch': Placeholder('ceph_branch'),
         },
+        'ansible.cephlab': {
+            'skip_tags': 'user,pubkeys,nagios,nrpe',
+        },
         'ceph': {
             'conf': {
                 'mon': {