Fix ProcessUpdateTest and SearchApiTest to use prism

We have some weak tests which work in embedded mode, but fail in distributed. Issue exists because in case of distributed mode, entity submit is not allowed via server although we can schedule via prism/server.
Below is a list of tests which need to be fixed:

• ProcessUpdateTest#updateProcessWithLateData
  This might affect failure in distributed setup:

  cluster.getProcessHelper().submitAndSchedule(process.toString());
  

• SearchApiTest#prepareData()