Handle case in which EXPECTED_ORIENTATIONS is not set on the command line properly.
Handle case in which EXPECTED_ORIENTATIONS is not set on the command line properly.

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