Add tests for mvn_alias, mvn_file and mvn_build
Add few more tests for python scripts.
Fix depmap namespace testcase
Use os.path.splitext in maven_depmap.py
Revert "Add support for installing JARs w/o POM"

This reverts commit 9d391cc303926f4f32efcb52c432436dcf94a26c.
Rework maven_depmap.py
Add rhbz#986909 to TODO