Fix log message format issue for api

There is a log message format typo in quota_classes api,
this patch fix it.

Change-Id: Idfb9fb16e4184e226b56bf05ffcaf9fb174feaff
XenAPI: Fix caching of images

Clearing of the cached images' name_label means it can't be found in future.
Name label of cloned VDI should be cleared so it is not found by the
caching functions.

Main impact of this is in test scenarios where the VM is always deleted, but
a more subtle impact could be data leakage.

Change-Id: I6bb80443d31128b7d5d47e4b252db5eb8ab86940
Closes-bug: 1254714
Corrected typo in host_manager

Change-Id: I6173e00000c7245bf190165182e2242a540aff0d
Merge "Fix log message format issue for api"
Merge "XenAPI: Fix caching of images"
Merge "Corrected typo in host_manager"