(bug 44683) Fixed unserialization of qualifiers in claim serializer

The claim serializer assumed the qualifiers in a serialized claim would be a plain
array of snaks. However, the qualifiers should be sent to API in the same serialized
form they are returned which is a serialized SnakList object.

Change-Id: I7a729a7d86529f359d5ee33d895985e89e9c69ee
Merge "(bug 44683) Fixed unserialization of qualifiers in claim serializer"