Fix EZP-22360: clear use role cache when moving locations from legacy
EZP-22146: remove deprecated join causing excessive memory usage
Merge pull request #744 from joaoinacio/EZP-22360_usergroup_role_cache

Fix EZP-22360: clear use role cache when moving locations from legacy
Fix EZP-22409: Creating an object with relationlist fails when target class is being edited.
Fix EZP-22404: resource paths are relative to kernel.root_dir
Merge pull request #749 from joaoinacio/EZP-22404_storage_engines_path

Fix EZP-22404: Fatal error in TransformationProcessor
Added Regression Test for EZP-22409
Merge pull request #751 from joaoinacio/EZP-22409_relationlist_class_version

Fix EZP-22409: Creating an object with relationlist fails when target cl...
Simplify .travis.yml test matrix & add inline doc to explain it
Merge pull request #752 from ezsystems/travis_matrix_impr

Simplify .travis.yml test matrix & document it inline