Bug#35610948 classic_query_forwarder.cc is too large

classic_query_forwarder.cc reached over 2500 lines.

Change
------

- split the query-param code out into its own classic_query_param.cc
  file (moves 500 lines)

Change-Id: Ibddc43e341906ae79d7c831940082c665b9c4ea5

Author: weigon

router/src/routing/src/CMakeLists.txt

@@ -113,6 +113,7 @@ ADD_LIBRARY(routing SHARED
 
   classic_greeting_receiver.cc
 
+  classic_query_param.cc
   classic_session_tracker.cc
 
   sql_value.cc