** Removed commons-io version override from muikku-core-plugins
** Added more test data for user / role testing purposes
** Added school data entities for GradingScale and GradingScaleItem
** Added corresponding jpa entities for GradingScale and
GradingScaleItem school data entitites
** Added initial versions of GradingController, GradingSchoolDataBridge
and GradingSchoolDataController
** Added initial version of GradingScale support into school data mock
plugin
** Added test data for mocked grading scales