Remove dependence on JAVA6_HOME environment variable.
Remove dependence on JAVA6_HOME environment variable.

nh13/picard,broadinstitute/picard,annkupi/picard,annkupi/picard,nh13/picard,nh13/picard,broadinstitute/picard,alecw/picard,alecw/picard,annkupi/picard,alecw/picard,nh13/picard,broadinstitute/picard,broadinstitute/picard,alecw/picard,broadinstitute/picard,annkupi/picard