Bug#900419: h5py: Now emitting warnings, breaking pbgenomicconsensus tests

[Graham Inggs]

Control: severity -1 serious
Control: affects -1 src:pbgenomicconsensus
This also causes pbgenomicconsensus to FTBFS [1] in unstable.


[1] 
https://tests.reproducible-builds.org/debian/rb-pkg/unstable/amd64/pbgenomicconsensus.html