Fix issues #6 and #7

This PR fixes:

• Issue #6 (closed) on the paths for applis
• Issue #7 (closed) on the wrong use of assert.

The overall behavior of the repository is closer to the expected behavior of an automatic testing suite and should improved robustness of releases.

Note: The python client test_* space and the one of the modules have a strange behavior. It is not possible to add members to an object given as the argument of a function.