Please try setting it as:
It is meant to be the equivalent to JAVA_HOME, not a reference to the java executable. So bcbio does not use it in your case. If it is working correctly you should see the java referenced in the command as your locally installed version rather than the bcbio installed one.
The command should also not have:
unset JAVA_HOME && export PATH=/mnt/isilon/cbmi/variome/bin/bcbio-nextgen/bcbio/anaconda/bin:$PATH
which is bcbio referencing it is installed java rather than the system one.
Hope this works for you.