Replace Container ENV var EMS_IDS->_ID

Workers having a comma separated list of EMS IDs has been replaced with
moving child-manager refresh logic into the parent-manager refresher.

app/models/miq_worker/deployment_per_worker.rb

@@ -5,7 +5,7 @@ module DeploymentPerWorker
     def create_container_objects
       ContainerOrchestrator.new.create_deployment(worker_deployment_name) do |definition|
         configure_worker_deployment(definition, 1)
-        definition[:spec][:template][:spec][:containers].first[:env] << {:name => "EMS_IDS", :value => Array.wrap(self.class.ems_id_from_queue_name(queue_name)).join(",")}
+        definition[:spec][:template][:spec][:containers].first[:env] << {:name => "EMS_ID", :value => self.class.ems_id_from_queue_name(queue_name)}
       end
     end