Update test_plugin.py

Author: SamRemis

tests/integration/customizations/s3/test_plugin.py

@@ -1374,12 +1374,12 @@ def test_mb_rb(self, s3_utils):
     def test_fail_mb_rb(self):
         #S3 can intermittenly return an `OperationAborted` exception instead of
         # `BucketAlreadyExists`, so we give this test three attempts
-        for _ in range(3):
+        for i in range(4):
             # Choose a bucket name that already exists.
             p = aws('s3 mb s3://mybucket')
             if "BucketAlreadyExists" in p.stderr:
                 break
-            time.sleep(1)
+            time.sleep(2**i)
         assert "BucketAlreadyExists" in p.stderr
         assert p.rc == 1