Update dependencies for optional functions

Signed-off-by: Webster Mudge <[email protected]>

Author: wmudge

galaxy.yml

@@ -26,9 +26,9 @@ dependencies:
   'ansible.posix': '1.3.0'
   'community.crypto': '2.2.1'
   'community.general': '4.5.0'
-  'community.mysql': '3.1.0'
-  'community.postgresql': '1.6.1'
-  'freeipa.ansible_freeipa': '1.6.2'
+  #'community.mysql': '3.1.0'
+  #'community.postgresql': '1.6.1'
+  #'freeipa.ansible_freeipa': '1.6.2'
 
 repository: https://github.com/cloudera-labs/cloudera.cluster
 documentation: https://github.com/cloudera-labs/cloudera.cluster