[addon] adds custom landing page for addon configuration

addon/lib/configuration.js

@@ -0,0 +1,16 @@
+function parseConfiguration(configuration) {
+  const configValues = configuration.split('|')
+      .reduce((map, next) => {
+        const parameterParts = next.split('=');
+        if (parameterParts.length === 2) {
+          map[parameterParts[0].toLowerCase()] = parameterParts[1];
+        }
+        return map;
+      }, {});
+  if (configValues.providers) {
+    configValues.providers = configValues.providers.split(',').map(provider => provider.toLowerCase());
+  }
+  return configValues;
+}
+
+module.exports = parseConfiguration;