CI: Allow to select service for RT stats analysis

When running phytest with FHI7.2 in Docker, two services are deployed:
dpdk-init and oai-gnb. Previously, AnalyzeRTStatsObject selected the
first deployed service for RT stats analysis.
Allow to explicitly select the service used for RT stats analysis instead
of relying on the first deployed service.

ci-scripts/main.py

@@ -259,7 +259,8 @@ def ExecuteActionWithParam(action, ctx, node):
 
 	elif action == 'AnalyzeRTStats_Object':
 		yaml = test.findtext('stats_cfg')
-		success = CONTAINERS.AnalyzeRTStatsObject(HTML, node, ctx, yaml)
+		service = test.findtext('service')
+		success = CONTAINERS.AnalyzeRTStatsObject(HTML, node, ctx, yaml, service)
 
 	else:
 		logging.warning(f"unknown action {action}, skip step")