fix(db-upgrade): use varchar on postgres

related to #CAM-858
fix(ejb-pa): remove final method modifiers

- remove 'final' method modifiers in AbstractProcessApplication
- allows deployment on Weblogic

fixes #CAM-894
refactor(compensation): simplify get scope exe

- simplify logic for getting the scope execution.

related to #CAM-886
chore(js assets): update bpmn renderer in tasklist and cockpit
 Prepare release: set version to 7.0.0-alpha6
 Next development version: 7.0.0-SNAPSHOT
Merge branch 'master' of github.com:camunda/camunda-bpm-platform
chore(cockpit.base-plugin): restructure files
Merge branch 'master' of github.com:camunda/camunda-bpm-platform
feat(cockpit): Add incident badge on activities

- If there are any incidents in a process instance on the aggregated view
  of the corresponnding process definition any badge containing "!" will
  be displayed on the activities wich have the incidents.
- On the process instance view the corresponding incidents are shown too.
- Add some test cases

related to CAM-785
fix(cockpit): Show incident badge always as last

- fix that the badge which represents at least one incident will always be
  displayed as last one (behind other badges)

related to CAM-785
fix(variables): Show variables in instance view

- All variables are initially shown in the process instance view

related to CAM-780
refactor(cockpit): add multi-tenacy + various improvements

multi tenacy
- add a servlet filter that serves cockpit from /app/{engineName}/ paths
- refactor filter infrastructure
- add multiple two more engines to dev setup
- add client side drop down to choose current engine
- current engine is read from url
- add replace support for :engine with current engine in Uri#appUri

other changes / improvements
- update main index.html to use absolute path rather than relative one
- migrate message structure from Errors to Notifications
- implement resource resolving

other cleanup being done
- remove unused root controller
- fix spacing all over projects
- fix usage of ' in place of " in may files

Closes CAM-879
chore(qa): make signavio coodinates configurable
Merge branch 'master' of github.com:camunda/camunda-bpm-platform
chore(qa): add maven props for signavio
impr(cockpit): add load indicator + bpmn20 xml caching
fix(cockpit): use correct pathing for multi-tenacy

Related to CAM-879
Merge branch 'master' of github.com:camunda/camunda-bpm-platform
feat (engine): Multiple Instance now works with empty collections

closes CAM-879