Exit eval if training steps are complete.

PiperOrigin-RevId: 428629058

research/object_detection/model_lib_v2.py

@@ -1164,3 +1164,7 @@ def eval_continuously(
           postprocess_on_cpu=postprocess_on_cpu,
           global_step=global_step,
           )
+
+    if global_step.numpy() == configs['train_config'].num_steps:
+      tf.logging.info('Exiting evaluation at step %d', global_step.numpy())
+      return