Goss doesn't escape output in generated JUnit XML

[AlexandreCarlton]

When generating JUnit XML, Goss does not escape special characters which can result in malformed XML.

As an arbitrary example:

command:
  echo 'foo' > /dev/null:
    exit-status: 0

The resulting XML is:

<?xml version="1.0" encoding="UTF-8"?>
<testsuite name="goss" errors="0" tests="1" failures="0" skipped="0" time="0.002" timestamp="2017-03-11T06:52:24Z">
<testcase name="Command echo 'foo' > /dev/null exit-status" time="0.002">
<system-out>Command: echo 'foo' > /dev/null: exit-status: matches expectation: [0]</system-out>
</testcase>
</testsuite>

Notably, the > and ' characters are not escaped in both the text of system-out and the name attribute of testcase. It would be really great if that could be fixed. :)

[LudwigHoff]

+1