Avoid openstacksdk image delete bug

When using the tasks API, sdk was unable to delete an image from
the provider. This is fixed in 0.32.0.

Change-Id: I97ebc2bc4ad458926b400c1ccf12e5853fc18761

requirements.txt

@@ -8,7 +8,8 @@ statsd>=3.0
 PrettyTable>=0.6,<0.8
 # openstacksdk before 0.27.0 is TaskManager based
 # 0.28.0-0.31.0 fail to upload images with glance tasks.
-openstacksdk>=0.27.0,!=0.28.0,!=0.29.0,!=0.30.0,!=0.31.0
+# 0.31.1 and 0.31.2 have a bug with image deletion in tasks API
+openstacksdk>=0.27.0,!=0.28.0,!=0.29.0,!=0.30.0,!=0.31.0,!=0.31.1,!=0.31.2
 diskimage-builder>=2.0.0
 voluptuous
 kazoo