
Calls to screen_it and screen_stop should be replaced by run_process and stop_process, as in Ia3843818014f7c6c7526ef3aa9676bbddb8a85ca. While this code worked fine with screen, DevStack now defaults to managing services with systemd. This patch ensures Blazar services are correctly launched and stopped, whether using systemd or screen. Change-Id: I99744a2e2adc46682f2ff78bdf0b09608d83d9c2 Closes-Bug: #1691425