Merge branch 'install_dir_change' into develop

Conflicts:
	CMakeLists.txt
	Documentation/Tutorials/Administration-Tutorial.md
	log_manager/CMakeLists.txt
	server/core/CMakeLists.txt
	server/core/gateway.c
	server/core/maxkeys.c
	server/core/maxpasswd.c
	server/modules/filter/test/CMakeLists.txt
	server/modules/routing/CMakeLists.txt

query_classifier/CMakeLists.txt

@@ -1,5 +1,5 @@
 add_library(query_classifier SHARED query_classifier.cc)
-install(TARGETS query_classifier DESTINATION lib)
+install(TARGETS query_classifier COMPONENT lib DESTINATION ${MAXSCALE_LIBDIR})
 if(BUILD_TESTS)
   add_subdirectory(test)
 endif()