Switch ui/quickqanava to overlay convention

.orchestra/config/components.yml

 #@ load("@ytt:template", "template")
 #@ load("@ytt:data", "data")
 
-#@ load("/components/ui/quickqanava.lib.yml", "quickqanava_component")
 #@ load("/components/ui/qt_creator.lib.yml", "qt_creator_component")
 #@ load("/components/ui/graphviz.lib.yml", "graphviz_component")
 #@ load("/components/ui/adaptagrams.lib.yml", "adaptagrams_component")
@@ -26,7 +25,6 @@
 
 #@ load("/global_options.lib.yml", "options")
 components:
-  ui/quickqanava: #@ quickqanava_component
   ui/qt-creator: #@ qt_creator_component
   ui/graphviz: #@ graphviz_component
   ui/adaptagrams: #@ adaptagrams_component

.orchestra/config/components/ui/quickqanava.lib.yml → .orchestra/config/components/ui/quickqanava.yml

+#@ load("@ytt:overlay", "overlay")
 #@ load("/lib/cmake.lib.yml", "cmake_boost_configuration", "typical_cmake_builds")
 
 #@ load("/global_options.lib.yml", "options")
@@ -15,11 +16,10 @@ dependencies:
 use_asan: false
 #@ end
 
+#@overlay/match by=overlay.all, expects=1
+#@overlay/match-child-defaults missing_ok=True
 ---
-#@ def _quickqanava_component():
-repository: ui/quickqanava
-builds: #@ typical_cmake_builds(**build_args())
-#@ end
-
----
-#@ quickqanava_component = _quickqanava_component()
+components:
+  ui/quickqanava:
+    repository: ui/quickqanava
+    builds: #@ typical_cmake_builds(**build_args())