chore(engine): code cleanup

related to CAM-2628
chore(engine): add revision property to filters

related to CAM-2628
test(engine): add assertions to filter query sorting

related to CAM-2628
chore(engine): remove unused json converters

related to CAM-2628
test(engine): throw exception on filter resource type update

related to CAM-2628
fix(wildfly): fix selective deployment of changed resources

related to CAM-2213
test(call-activity) add test for combination of all vars + mapping
Merge pull request #101 from falko/new-call-activity-test

test(call-activity) add test for combination of all vars + mapping
fix(groups): double encode backslash

Related to: #CAM-2391
test(engine): throw exception on filter resource type update

related to CAM-2628
chore(engine/filter): add authorizations for filters

related to #CAM-2704