Refactor PartitionsSaxHandler to use boost::json

Previously it was based on rapidjson
The tests are adjusted accordingly.

Relates-To: OCMAM-448
Signed-off-by: Alexander Sopov <ext-alexander.sopov@here.com>

Author: asopov-here

olp-cpp-sdk-dataservice-read/src/repositories/AsyncJsonStream.cpp

@@ -35,10 +35,9 @@ boost::json::string_view RapidJsonByteStream::ReadView() {
   if (ReadEmpty()) {
     SwapBuffers();
   }
-  auto terminator_it =
-      std::find(read_buffer_.begin() + count_, read_buffer_.end(), '\0');
   auto begin = read_buffer_.begin() + count_;
-  boost::core::basic_string_view<char>::size_type size =
+  auto terminator_it = std::find(begin, read_buffer_.end(), '\0');
+  boost::json::string_view::size_type size =
       std::distance(begin, terminator_it);
   count_ += size;
   full_count_ += size;

olp-cpp-sdk-dataservice-read/src/repositories/PartitionsRepository.cpp

@@ -660,7 +660,6 @@ client::ApiNoResponse PartitionsRepository::ParsePartitionsStream(
 
     auto reader_cancellation_token =
         client::CancellationToken([parser, &async_stream]() {
-          // partitions_handler->Abort();
           parser->handler().Abort();
           async_stream->CloseStream(client::ApiError::Cancelled());
         });