Make query classifier self-contained.

Only the query classifier needs the functionality of the embedded
server, while the rest of MaxScale is content with the client
library or Connector/C.

This have now been rearranged so that query-classifier links with
the embedded static library and then explicitly exports its own
functions using the query_classifier.map linker script. That way
query classifier will use the embedded library, while the rest of
maxscale use the client library, and this without conflicts.

Currently, query_classifier is not linked to maxscale-common,
but executables must link to maxscale-common and query_classifier.

server/modules/routing/binlog/CMakeLists.txt

@@ -4,7 +4,7 @@ target_link_libraries(binlogrouter maxscale-common)
 install(TARGETS binlogrouter DESTINATION ${MAXSCALE_LIBDIR})
 
 add_executable(maxbinlogcheck maxbinlogcheck.c blr_file.c blr_cache.c blr_master.c blr_slave.c blr.c)
-target_link_libraries(maxbinlogcheck maxscale-common)
+target_link_libraries(maxbinlogcheck maxscale-common query_classifier)
 
 install(TARGETS maxbinlogcheck DESTINATION bin)
 

server/modules/routing/binlog/test/CMakeLists.txt

@@ -1,5 +1,5 @@
 if(BUILD_TESTS)
   add_executable(testbinlogrouter testbinlog.c ../blr.c ../blr_slave.c ../blr_master.c ../blr_file.c ../blr_cache.c)
-  target_link_libraries(testbinlogrouter maxscale-common)
+  target_link_libraries(testbinlogrouter maxscale-common query_classifier)
   add_test(TestBinlogRouter ${CMAKE_CURRENT_BINARY_DIR}/testbinlogrouter)
 endif()