splunk 6.1.X boot-start: running with group root (CentOS 6.5) - how force another group?

hi!

Since splunk 6.1.1 we encounter a problem because boot-start creates an init-script which causes the splunk process to run as user splunk - but group 0 (root) - but the files to be indexed are only available to the group splunk.

Is there a way to force the splunk-process to run as splunk:splunk?

something like

SPLUNK_OS_GROUP=splunk

(which doesn't work) in etc/splunk-launch.conf ?

regards,

philipp