feat(cockpit): add vars to proc inst query

- add client side parts of query

Related to CAM-784
fix(mssql-drop-script): unique indexes must be dropped with drop constraint
chore(test): Improve test setup

related to CAM-960
Merge branch 'master' of github.com:camunda/camunda-bpm-platform
feat(rest) added name to activity instance dto
feat(engine/rest) Added activity name to activity instance interface
chore(merge): merge from remote
fix(cycle-test): fix BpmnDiagramServiceSyncStatusTest

- fix infrequently failing BpmnDiagramServiceSyncStatusTest through mock removal and introduced setter-injection for some classes under test

related to CAM-1046
feat(businessKey): Add businessKey to query

- now it is possible to query after called process definitions which
  parent process instances have the passed businessKey

related to CAM-910
fix(cockpit/client): use correct procdef service

- Restore change that got lost in merge

Related to CAM-784
Merge branch 'master' of github.com:camunda/camunda-bpm-platform
Merge branch 'master' of github.com:camunda/camunda-bpm-platform
fix(authorization-mssql): use correct statement for index creation
feat(variables): Add variables to query

- now it is possible to query after called process definitions which
  parent process instances (who called the process definitions) contains
  the passed variables with the assigned value

related to CAM-910
Merge branch 'master' of github.com:camunda/camunda-bpm-platform
fix(test): Fix variable test cases in cockpit
fix(diagram): Fix scrolling to element on click

- remove scroll behavior on click on an element

related to CAM-783
chore(cockpit): Add processes to dev-setup

related to CAM-783
fix(mssql-drop-script): drop unique indexes
feat(engine/bpmn): add message end event
- message end event has the same behaviour as for service task
- add test cases

related to CAM-436