feat(upgrade-scripts): add task suspension state to h2/mysql scripts

related to CAM-447
refactor(cockpit): rename /cockpit => /camunda

- Braking change: all cockpit URLs changed

related to #CAM-995
fix(engine-drop-mysql): Replace constraint with FOREIGN_KEY
Merge branch 'master' of github.com:camunda/camunda-bpm-platform
fix(mysql): remove drop constraint
fix(cockpit): pattern matcher test
fix(cockpit): Show engine selection

- engine selection will only be shown, if more than one engine is
  available

related to CAM-971
chore(upgrade-test): configure build to clean up the db after tests
feat(upgrade-scripts): extend scripts for task suspension states

- extends scripts for db2, mssql, oracle and postgres

related to CAM-447
chore(merge): merge sql upgrade scripts for suspended tasks
impr(rest): user & group methods & paths

related to #CAM-957 #CAM-958 #CAM-959
Merge branch 'master' of github.com:camunda/camunda-bpm-platform
fix(upgrade-scripts): correct postgres and mssql scripts
feat(admin): start work on admin application

related to #CAM-995
Merge branch 'master' of github.com:camunda/camunda-bpm-platform
add(distro): add start-camunda.sh to assembly
Merge branch 'master' of github.com:camunda/camunda-bpm-platform
test(integration): add integration test for independent job execution
fix(webapp): engine filter testcase
Merge branch 'master' of github.com:camunda/camunda-bpm-platform