Mute console output in test

[ashawley]

A typical running of the test suite results in the following transcript:

Testing scala-xml version 1.0.6-SNAPSHOT.
:9:19: '/' expected instead of ''                  ^
:9:19: name expected, but char '' cannot start a name                  ^
[info] Passed: Total 106, Failed 0, Errors 0, Passed 106
[success] Total time: 19 s, completed Sep 14, 2015 2:19:49 PM

The second and third lines aren't useful unless you were debugging the particular test, scala.xml.pull.XMLEventReaderTest.missingTagTest. The patch below simply quiets the console output by overriding the reportError method of scala.xml.pull.XMLEventReader to do nothing. Here's the new transcript:

Testing scala-xml version 1.0.6-SNAPSHOT.
[info] Passed: Total 106, Failed 0, Errors 0, Passed 106
[success] Total time: 18 s, completed Sep 14, 2015 2:29:14 PM

Presumably, there is a way to capture the output and assert what it is, but I didn't look in to it.

[ashawley]

Turns out the changes I made here are already made in the pull request #44 by @som-snytt. That PR needs to be rebased to get the latest changes from master, but if it does get merged, my PR here can just be closed.

[ashawley]

I opened #93 that minimizes the changes to fix #35 and #44, so this pull request is relevant again.

[ashawley]

This was fixed when #99 was merged.