[bug 1081413] Move url validation code into fjord_utils.js
Rewrote url validation code that was in generic_feedback.js and added it to fjord_utils.js
[bug 1081413] Change code for url validation

The code for url validation has been changed to be in line with the url validation code addition made in base/static/js/fjord_utils.js
[bug 1081413] Add test for url validation
[bug 1081413] Correct operator in test_fjord_utils.js
Merge pull request #367 from aokoye/1081413-validation-fjord_utils

[bug 1081413] URL validation code edits, additions, and test