Examples of Group Mapping
<provider> <role>identity-assertion</role> <name>Pseudo</name> <enabled>true</enabled> <param> <name>principal.mapping</name> <value>guest,alice=hdfs;mary=hive</value> </param> <param> <name>group.principal.mapping</name> <value>*=users; same,dwayne,brenda-admins;joe=analysts</value> </param> </provider>