Updated test README to include a section on environment-protractor.js

The environment file is .gitignored so random selenium servers aren't accidentally pushed.

webclient/test/README

@@ -8,11 +8,17 @@ Setting up continuous integration / run the unit tests (make sure you're in
 this directory so it can find the config file):
   karma start
 
+
 Setting up e2e tests (only if you don't have a selenium server to run the tests
 on. If you do, edit the config to point to that url):
+
   webdriver-manager update
   webdriver-manager start
 
+  Create a file "environment-protractor.js" in this directory and type:
+    var seleniumAddress = 'http://localhost:4444/wd/hub';
+
+
 Running e2e tests:
   protractor protractor.conf.js