lint: skip the linter

Do not run the linter for these 3:

* we use latest for pip docker-py package
* for ssl keys this is a false positive since the inital command is a
'shell' it'll always change
* for keystone, we must use shell since the with_items contains pipes

Signed-off-by: Sébastien Han <seb@redhat.com>

tasks/openstack-keystone.yml

@@ -29,3 +29,5 @@
   with_items:
     - "openssl x509 -in /etc/keystone/ssl/certs/ca.pem -pubkey | certutil -d {{ radosgw_nss_db_path }} -A -n ca -t 'TCu,Cu,Tuw'"
     - "openssl x509 -in /etc/keystone/ssl/certs/signing_cert.pem -pubkey | certutil -A -d {{ radosgw_nss_db_path }} -n signing_cert -t 'P,P,P'"
+  tags:
+    - skip_ansible_lint