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

[Debian testing autoremoval watch]

libmems 1.6.0+4725-4 is marked for autoremoval from testing on 2018-09-16

It (build-)depends on packages with these RC bugs:
905384: libmuscle1: libmuscle1 provides libmuscle-3.7-1 but doesn't ship the library