- handle auto modules in Library containers like JUNIT
- avoid in ModuleSelectionDialog:
  - duplicate modules (e.g., from different JREs)
  - interpreting jars from a non-modular JRE as auto modules

Change-Id: I1173b5252ce020d055b99f68c846cf386eeaf00b
Signed-off-by: Stephan Herrmann <stephan.herrmann@berlin.de>