feat(job-def): Add support for job definitions

- Add new persistient entity JobDefinition
- Create job definitions when process definition is deployed
- Add query: managementService.createJobDefinitionQuery()
- Add suspend / activate for Job Definition
- refactor ACT_RU_JOB table:
  * add processDefinitionId and processDefinitionKey
  * add suspensionState
  * add jobDefinitionId
- refactor job acquisition query: remove join to ACT_RU_EXECUTION
- provide sql db migration script

related to #CAM-1459, #CAM-1461, #CAM-1467, #CAM-1463, #CAM-1464