Hadoop: GELF: update env vars per upstream
Hadoop: GELF: update env vars per upstream

Change-Id: I17973b4c11fea7044716741b2f6cab1eb097a85c

2014/puppet-cdh,zhihu/puppet-cdh,tomahc/puppet-cdh,zhihu/puppet-cdh,deric/puppet-cdh,deric/puppet-cdh,tomahc/puppet-cdh,deric/puppet-cdh,2014/puppet-cdh