Added Docker managed plugin config file

Author: ofiliz

cnm/plugin/config.json

@@ -0,0 +1,15 @@
+{
+	"description": "Azure network plugin",
+	"documentation": "https://github.com/Azure/azure-container-networking/",
+	"entrypoint": ["/usr/bin/azure-cnm-plugin"],
+	"interface": {
+		"types": ["docker.networkdriver/1.0", "docker.ipamdriver/1.0"],
+		"socket": "azurenet.sock"
+	},
+	"network": {
+		"type": "host"
+	},
+	"linux": {
+		"capabilities": ["CAP_SYS_ADMIN", "CAP_NET_ADMIN"]
+	}
+}