Query parameters set through RequestBuilder.queryParam(...) are ignored when using .search

[braveulysses]

Arbitrary query parameters set via RequestBuilder.queryParam(...) are ignored when used in conjunction with a search via POST.

Adding something like

      service.searchRequest("Users").
          filter(filter).
          queryParam(expectedKey, expectedValue).
          invokePost(UserResource.class);

to EndpointTestCase.testQueryParams() should reproduce this.

Note that there isn't actually an implementation yet. For the client to set these parameters, logic needs to be added to SearchRequestBuilder.invoke(boolean, SearchResultHandler<T>, Class<T>), similar to the existing logic there for handling arbitrary headers. Then, support will need to be added to the server component, in DotSearchFilter, I assume.