(maint) track down stack overflow

This temporarily turns on trace level logging for the puppetlabs namespace
while trying to track down the stack overflow seen in the tests.

dev-resources/logback-test.xml

@@ -7,6 +7,7 @@
 
     <logger name="org.eclipse.jetty" level="warn"/>
     <logger name="org.apache.http" level="warn"/>
+    <logger name="puppetlabs" level="trace"/>
 
     <root level="warn">
         <appender-ref ref="STDOUT" />