[t-server] Stabilize logiclayer properties param parsing behavior

[frabarz]

The logiclayer endpoint parsing happens with this logic. Specifically, the properties parsing happens in this fragment.

Note the comment: the code currently checks in a for loop if the property's name is present in the cache HashMap, and breaks the loop if it isn't. This means passing &properties=valid,valid,invalid,valid as parameter in the query would return only the first two valid properties, and ignore the last one silently. This is not a good behavior, because the user expects 4 properties, and is not getting informed why only gets 2.