Add unit tests for HTML Instrumentation.
Update DOMHelper to support uppercase tag names.
Add one more empty tag -- wbr.
Add code to ignore invalid closing empty tags.
Add one more test case for uppercase tag names.
Add a general validation on marks creation.
Use spyOn to verify that cache was in use.
Fix the test case that is using spyOn and add another one to test on refreshing the cache. Also add an empty line to  the test file.
Removed an unused variable and update timestamp the right way.
Fix #3327 by using "closed" property for payloads of script tags. Also instrument all empty tags, not just img and input tags. So a bunch of unit tests are updated to reflect those changes.
Use i flag in the regular expression instead of having A-Z.
Put i flag in the right place in the regular expression.
Merge pull request #3318 from adobe/rlim/html-instrumentation-test

Add unit tests for HTML Instrumentation.