code: @DELETE
      @Path("/terminate")
      @ApiOperation("Terminate workflows execution")
      public BulkResponse terminate(List<String> workflowIds, @QueryParam("reason") String reason) {
          return workflowBulkService.terminate(workflowIds, reason);
      }
docs: Terminate workflows execution.
  @param workflowIds - list of workflow Ids  to perform terminate operation on
  @param reason - description to be specified for the terminated workflow for future references.
  @return bulk response object containing a list of succeeded workflows and a list of failed ones with errors