Fix an issue where by a call to ec2.get_image wasn't wrapped in a try/except, and would occasionally throw an exception in the wild. Also greatly simplifies two of the ugliest known loops to man down into a single loop. (#2554)

cloud/amazon/ec2_ami.py

@@ -251,23 +251,17 @@ def create_image(module, ec2):
     for i in range(wait_timeout):
         try:
             img = ec2.get_image(image_id)
-            break
+
+            if img.state == 'available':
+                break
         except boto.exception.EC2ResponseError, e:
-            if 'InvalidAMIID.NotFound' in e.error_code and wait:
-                time.sleep(1)
-            else:
-                module.fail_json(msg="Error while trying to find the new image. Using wait=yes and/or a longer wait_timeout may help.")
-    else:
-        module.fail_json(msg="timed out waiting for image to be recognized")
+            if ('InvalidAMIID.NotFound' not in e.error_code and 'InvalidAMIID.Unavailable' not in e.error_code) and wait and i == wait_timeout - 1:
+                module.fail_json(msg="Error while trying to find the new image. Using wait=yes and/or a longer wait_timeout may help. %s: %s" % (e.error_code, e.error_message))
+        finally:
+            time.sleep(1)
 
-    # wait here until the image is created
-    wait_timeout = time.time() + wait_timeout
-    while wait and wait_timeout > time.time() and (img is None or img.state != 'available'):
-        img = ec2.get_image(image_id)
-        time.sleep(3)
-    if wait and wait_timeout <= time.time():
-        # waiting took too long
-        module.fail_json(msg = "timed out waiting for image to be created")
+    if img.state != 'available':
+        module.fail_json(msg="Error while trying to find the new image. Using wait=yes and/or a longer wait_timeout may help.")
 
     if tags:
         try: