Fix delay calculation (#178)

Co-authored-by: stas <statis@microsoft.com>

Author: stishkin

cli/raft_local.py

@@ -243,7 +243,7 @@ def start_test_targets(self, job_config, job_id, work_dir, job_dir, bridge_name)
                 for service in services:
                     d = service.get('ExpectedDurationUntilReady')
                     if d:
-                        test_services_startup_delay = time_span_to_seconds(d)
+                        test_services_startup_delay = max(test_services_startup_delay, time_span_to_seconds(d))
 
                 for service in services:
                     env = self.common_environment_variables(job_id, work_dir)