grouper_conf env var not honored

All,
I'm still running on 1.6.3, so this may have already been corrected
in 2.0. I was trying to run a second ldappcng provisioner using a
different configuration. I set $GROUPER_CONF in my environment to test
it out, but it kept using $GROUPER_HOME/conf.

In looking at the script, I saw:

1. Append Grouper's configuration
   GROUPER_CP=${GROUPER_HOME}/conf

I changed that to:

1. Append Grouper's configuration
   GROUPER_CP=${GROUPER_CONF}

To get the desired functionality. $GROUPER_CONF is set just prior to
that, using $GROUPER_HOME/conf as a default.

-paul