Update UI test fixture

Refs #6364, proper fix for json_encode error on some 5.3 versions of PHP. When decoding   use UTF8 encoding so json_encode will not complain.

Use svg instead of png to get better image quality

Removed a reference to a security "best practice"

This change includes three things:

1. Removing note about omitting version number due to "security best practices" as not including a version number is actually more [security through obscurity](https://en.wikipedia.org/wiki/Security_through_obscurity) rather than any real security.
2. Removed the irrelevant Stallman reference.
3. Syntax highlighting.

refs #6432 this should fix js error in dashboard in case user country map is used. It fails because of newly introduced Array.prototype.values method in Ecmascript 6. Will have to update Chroma lib

Reduce the number of travis jobs from 20 to 11

refs #6413 execute js/angular tests earlier as they are quick to execute. Otherwise we have to wait forever for a result

Refs #6364, encode columns in PivotByDimension filter to ensure UTF-8 encoding. Will avoid php warning given on some PHP 5.3 builds for json_encode-ing decoded   entities.

At least for now as mentioned in ticket it does not really make sense
to run them and they take a long time > 50 minutes.

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