In your provider-family stanza, could you try adding this parameter (as specified in https://www.cloudera.com/documentation/enterprise/5-5-x/topics/cdh_sg_hbase_authentication.html) 
  [provider-family:hbase_family]
vix.mode = stream
vix.command =  java
vix.command.arg.1 = -Xmx512m
vix.command.arg.2 = -classpath
vix.command.arg.3 = $SPLUNK_HOME/bin/jars/SplunkMR-h1.jar:$SPLUNK_HOME/etc/apps/${project.artifactId}/bin/${project.artifactId}-${project.version}.jar:$SPLUNK_HOME/etc/apps/${project.artifactId}/bin/lib/*
vix.command.arg.4 = -Djava.security.auth.login.config=/etc/hbase/conf/zk-jaas.conf
vix.command.arg.5 = com.splunk.erp.hbase.HBaseERP
  
 where /etc/hbase/conf/zk-jaas.conf contains the following: 
     Client {
      com.sun.security.auth.module.Krb5LoginModule required
      useKeyTab=true
      useTicketCache=false
      keyTab="/etc/hbase/conf/hbase.keytab"
      principal="hbase/fully.qualified.domain.name@<YOUR-REALM>";
   };
  
						
					
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