Add unittest to test TARDIS/COBalD entry_points

[giffels]

The factory function

tardis/tardis/resources/poolfactory.py

Line 24 in 8303de8

def create_composite_pool(configuration='tardis.yml'):

is available as COBalD YAML plugin., hence it is included in the entry_points inside setup.py

tardis/setup.py

Line 40 in 33f12ab

entry_points={

.

Talking to @maxfischer2781 we can currently not unittest those tags, since the package needs to be installed before testing. This is possible using pytest, however no solution for the unittest package has been found yet.