Enable strict

This enables the function form of the "use strict" invocation. In
general, 'strict' is considered a good practice, so enabling it
is good. Requiring the function method of use strict avoid a
common bug encountered with a global strict declaration, where
the rule applies to all javascript that comes after the global
"use strict" statement. Using the function method prevents
brittleness, by creating a scope around the 'strict' case.

http://eslint.org/docs/rules/strict

Change-Id: I5c89c26d2d7a38c342e7c8f49f8cabe145dd02c0

.eslintrc

@@ -418,7 +418,7 @@ rules:
   # controls location of Use Strict Directives
   # http://eslint.org/docs/rules/strict
   strict:
-    - 0 # TODO(krotscheck): Discuss & Activate
+    - 2
     - "function"
 
   #############################################################################

index.js

@@ -19,6 +19,7 @@
  * as a module.
  */
 (function () {
+  "use strict";
 
   var yaml = require('js-yaml');
   var fs = require('fs');

spec/index.js

@@ -1,4 +1,5 @@
 describe("Unit: eslint-config-openstack", function() {
+  "use strict";
 
   it("should set espree as the default parser.", function() {
     var config = require('../index');