upgrade htsjdk to 2.15.1 (#1181)
upgrade htsjdk to 2.15.1 (#1181)


broadinstitute/picard,alecw/picard,broadinstitute/picard,alecw/picard,alecw/picard,broadinstitute/picard,broadinstitute/picard,alecw/picard,broadinstitute/picard