Ambari configuration for ranger-tagsync needs to support ranger.tagsync.source.atlasrest.keystore.filename property

In Ranger-Tagsync configuration using Ambari, the following improvements need to be made.

1. If Atlasrest is selected as tag-source, then Atlas Endpoint (from the Atlas URL) and Atlas source download interval (default:60000) need to populated.
2. In Advanced->Advanced ranger-tagsync-site tab, ranger.tagsync.source.atlasrest.keystore.filename property needs to be added and auto-populated to a reasonable default (such as /usr/hdp/current/ranger-tagsync/conf/atlasuser.jceks). If this property is not specified or has no value, then updatetagadminpassword.py script fails.