Modify checks for OSGIModule to look for AbstractOSGIModule

[jesse-gallagher]

When I added the workarounds for OSGIModule (for Equinox Servlets), I figured that they'd probably less needed for OSGIWebContainerModule. However, that class doesn't provide much introspection either - no ClassLoader or the like. So it'd make sense to add the workarounds for CDI to this as well, looking up the active Bundle for coordination.