bluetooth: Tweak test_wait_for_resume to set resume_slack and fail_early_wake.

BUG=b:178134544
TEST=Test locally

Change-Id: I86e809b70e10cbed447fea69e1b59a8152078906
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/autotest/+/2644300
Reviewed-by: Abhishek Pandit-Subedi <abhishekpandit@chromium.org>
Tested-by: Yu Liu <yudiliu@google.com>
Commit-Queue: Yu Liu <yudiliu@google.com>
diff --git a/server/site_tests/bluetooth_AdapterMTBF/bluetooth_AdapterMTBF.py b/server/site_tests/bluetooth_AdapterMTBF/bluetooth_AdapterMTBF.py
index 9655ec6..8d363cd 100644
--- a/server/site_tests/bluetooth_AdapterMTBF/bluetooth_AdapterMTBF.py
+++ b/server/site_tests/bluetooth_AdapterMTBF/bluetooth_AdapterMTBF.py
@@ -252,9 +252,11 @@
         # Expect a quick resume. If a timeout occurs, test fails.
         self.test_wait_for_resume(boot_id,
                                   suspend,
-                                  resume_timeout=20,
+                                  resume_timeout=15,
                                   test_start_time=start_time,
-                                  fail_on_timeout=True)
+                                  resume_slack=5,
+                                  fail_on_timeout=True,
+                                  fail_early_wake=False)
 
         # Finish peer wake process
         peer_wake.join()