updated test to handle new predictor

Added potential conflict to tree observation as an 8th feature. ATTENTION this means that the observation space dimension has increased! will still check that this is handled correctly everywhere but looks good.

# Conflicts:
#	flatland/envs/observations.py

Editor

See merge request flatland/flatland!62

Resolve "Access resources using pkg_resources and/or importlib_resources"

Closes #57

See merge request flatland/flatland!57

#64 bugfix prediction should respect target

Closes #64

See merge request flatland/flatland!61

Merge branch 'master' of gitlab.aicrowd.com:flatland/flatland into 57-access-resources-through-importlib_resources

Merge branch 'master' of gitlab.aicrowd.com:flatland/flatland into 64-prediction-should-respect-target