** Disabled 002_user_roles_mysql and 001_create_users_mysql scripts from
muikku data
** Added Pyramus environment roles synchronization into pyramus plugin
initialization
** Implemented listWorkspaceUsers in PyramusWorkspaceSchoolDataBridge
** Implemnted findRole, listRoles and findUserEnvironmentRole methods in
PyramusUserSchoolDataBridge
** Changed Pyramus student synchronization task to add students into
student environment role