Rename j$ to jasmineUnderTest for specs

- Clarifies what it is for when writing tests
- No longer named the same as the `jasmine` that is injected into live
  code

spec/html/MatchersHtmlSpec.js

@@ -2,7 +2,7 @@ describe("MatchersSpec - HTML Dependent", function () {
   var env, spec;
 
   beforeEach(function() {
-    env = new j$.Env();
+    env = new jasmineUnderTest.Env();
 
     var suite = env.describe("suite", function() {
       spec = env.it("spec", function() {