Remove request keys and values from response structures and feature vectors

[lisv]

Sometimes server responses include the entire (or parts of a) request that was sent. This leads to the responses being evaluated as completely new responses, while actually only the request values were different. This problem obstructs the clustering process, which is why the request keys/values should not be included in the response structures (that result in clusterObjects) and the feature vectors of responses (which are clustered).

[lisv]

Responses are checked for the keys from the request. If they exist in the response, they are not included in the structure/feature vector.