AutoTest: Allow colored commandline output

Some test frameworks allow to print their output colorful
to further indicate meanings of messages or test results.
Provide a highlighter for the textual output of the results
and enable this functionality for GTest and Boost UTF.
Keep at least a small backdoor for overwriting this by
the user.

Fixes: QTCREATORBUG-22297
Change-Id: Iddd2b734416de807635d90c6519553081f7372f2
Reviewed-by: David Schulz <david.schulz@qt.io>

src/plugins/autotest/boost/boosttestoutputreader.cpp

@@ -210,7 +210,7 @@ void BoostTestOutputReader::processOutputLine(const QByteArray &outputLine)
                                         "test module \"(.*}\"; see standard output for details");
     QString noErrors("*** No errors detected");
 
-    const QString line = QString::fromUtf8(outputLine);
+    const QString line = removeCommandlineColors(QString::fromUtf8(outputLine));
     if (line.trimmed().isEmpty())
         return;