Add YAML file for configmaps in concepts

docs/concepts/configuration/concept-configmap.yaml

@@ -0,0 +1,15 @@
+kind: ConfigMap
+apiVersion: v1
+metadata:
+  creationTimestamp: 2016-02-18T19:14:38Z
+  name: example-config
+  namespace: default
+data:
+  # example of a simple property defined using --from-literal
+  example.property.1: hello
+  example.property.2: world
+  # example of a complex property defined using --from-file
+  example.property.file: |-
+    property.1=value-1
+    property.2=value-2
+    property.3=value-3