Update XmlReporter to XML encode attribute strings
Update XmlReporter to XML encode attribute strings

Avoids problem where filename or description contains illegal XML
characters (like an ampersand) by escaping the output.

Change-Id: I161de23cd8d52d5b8bab540457fd5fcb4d44add9
Reviewed-on: http://gerrit.causes.com/37215
Tested-by: jenkins <d95b56ce41a2e1ac4cecdd398defd7414407cc08@causes.com>
Reviewed-by: Shane da Silva <6f6e68d1df92f30cb4b3ce35260ddf94a402f33d@causes.com>

artemartemov/scss-lint-hdm