support returning hosted services, storage services in get affinity group operation

[gcheng]

according to rest api documentation, these are supported
http://msdn.microsoft.com/en-us/library/windowsazure/ee460789.aspx

However, because we currently cannot create hosted service/storage service from Java. As a result, we hold the implementation of these two features for affinity group.

[markcowl]

closing as obsolete