Update picard and htsjdk (#6462)
Update picard and htsjdk (#6462)

* htsjdk 2.21.1 -> 2.21.2
* picard 2.21.7 -> 2.21.9
broadinstitute/hellbender,broadinstitute/hellbender,broadinstitute/hellbender,broadinstitute/hellbender,broadinstitute/hellbender,broadinstitute/hellbender