fix: increase number of retries for SSM send_command to 60 (#140)

Signed-off-by: Yutong Li <[email protected]>

src/deadline_test_fixtures/deadline/worker.py

@@ -253,7 +253,7 @@ def send_command(self, command: str) -> CommandResult:
         #
         # If we send an SSM command then we will get an InvalidInstanceId error
         # if the instance isn't in that state.
-        NUM_RETRIES = 30
+        NUM_RETRIES = 60
         SLEEP_INTERVAL_S = 10
         for i in range(0, NUM_RETRIES):
             LOG.info(f"Sending SSM command to instance {self.instance_id}")