For the following import jobs, we make more than one bulk request to store the data across various indices:

• CompletedActivityInstanceElasticsearchImportJob
• RunningActivityInstanceElasticsearchImportJob
• CompletedProcessInstanceElasticsearchImportJob
• RunningProcessInstanceElasticsearchImportJob
• VariableUpdateElasticsearchImportJob

We should look at ways in which we can reduce the number of ES requests we make for each of these. One approach would be to make a more generic bulk request handler, with the jobs being responsible for getting these bulks out of the services they use. Context: https://github.com/camunda/camunda-optimize/pull/1591#discussion_r377191209.

ATs:

• Import jobs no longer make multiple bulk requests to ES