[Debian-med-packaging] pbbam is marked for autoremoval from testing

[Debian testing autoremoval watch]

pbbam 0.19.0+dfsg-4 is marked for autoremoval from testing on 2019-03-21

It (build-)depends on packages with these RC bugs:
919928: htslib, src:python-pysam: htslib breaks python-pysam autopkgtest