Fix test on Windows

Author: lordgamez

extensions/couchbase/tests/PutCouchbaseKeyTests.cpp

@@ -82,7 +82,7 @@ class PutCouchbaseKeyTestController : public TestController {
 
     auto upsert_parameters = mock_couchbase_cluster_service_->getUpsertParameters();
     CHECK(upsert_parameters.document_type == expected_call_options.document_type);
-    std::string expected_doc_id = expected_call_options.doc_id.empty() ? flow_file->getUUID().to_string() : expected_call_options.doc_id;
+    std::string expected_doc_id = expected_call_options.doc_id.empty() ? flow_file->getUUIDStr() : expected_call_options.doc_id;
     CHECK(upsert_parameters.document_id == expected_doc_id);
     CHECK(upsert_parameters.buffer == stringToByteVector(input));