metadata_cache → include Relation

File in router/src/metadata_cache	Includes file in include
include / mysqlrouter / metadata.h	my_rapidjson_size_t.h
include / mysqlrouter / metadata_cache.h	my_rapidjson_size_t.h
src / cluster_metadata.cc	errmsg.h
src / cluster_metadata.cc	mysql.h
src / gr_notifications_listener.cc	my_thread.h
src / metadata_cache.cc	my_thread.h
src / metadata_cache_plugin.cc	my_thread.h