Updated default backoff from 2 seconds to 1.1s.

This will be about a total of 48 seconds in 10 tries. This is
configurable.

lib/ansible/module_utils/cloud.py

@@ -67,7 +67,7 @@ def found(response_code):
         pass
 
     @classmethod
-    def backoff(cls, tries=10, delay=3, backoff=2):
+    def backoff(cls, tries=10, delay=3, backoff=1.1):
         """ Retry calling the Cloud decorated function using an exponential backoff.
         Kwargs:
             tries (int): Number of times to try (not retry) before giving up