Removed skipped form type tests
removed skip from working test
Removed useless test :

- the test only checked if specific fields were configured
- no other DatagridManager is tested
- behat tests are more efficient for testing this
Merge branch 'fix/skipped-tests'

Conflicts:
	src/Pim/Bundle/CatalogBundle/Tests/Unit/Form/Type/ChannelTypeTest.php