Bundles that are not direct dependencies of a subsystem can be removed while still in use

Bundle A is a constituent of application subsystem S1
Bundle A is a constituent of application subsystem S2
Bundle A has a package import of b.package
Bundle B exports b.package
Bundle B imports c.package
Bundle C exports c.package
There is an obr repository with bundle b and c
Bundle B and C are not constituents
When installing S1 bundle B and C are added to the root subsystem to fullfill the requirements of bundle A
When installing S2 everything is still working.
Start S1.
Now we uninstall S1 and bundle C is removed.
refreshBundles
Subsystem S2 won't start anymore because of that.

The testcase uses different bundle ids.