Fixed Issues in Atlas

Review the list of Apache Atlas issues that are resolved in Cloudera Runtime 7.2.12.

CDPD-29335: Random NPE when retrieving tasks.

Handle null pointer exception when retrieving tasks using the admin/tasks endpoint. This issue is now resolved.

CDPD-28407: Set Apache Solr wait-searcher property to FALSE by default

When set to TRUE, this property allows synchronous Apache Solr commits, meaning that Apache Atlas commits have to wait until Apache Solr commits are successfully finished. This behavior decreases performance.