Add and update unit tests

[pFernbach]

• Add dependencies to hpp-environements, hpp-rbprm-robot-data and rbprm-talos to the tests/CMakeLists
• Uncomment reachability test from the CMakeLists and update it to use Talos instead of HRP-2
• Add a unit test for limb-rrt (there is a commented part because of a known issue https://github.com/humanoid-path-planner/hpp-rbprm/issues/46)
• Format all the files in tests/ with gepetto_linters
• Solve https://github.com/humanoid-path-planner/hpp-rbprm/issues/60