Fix syslog extension

Author: timofurrer

radish/extensions/syslog_writer.py

@@ -52,6 +52,8 @@ def log(self, message):
 
             :param string message: the message to log
         """
+        import syslog
+
         try:
             if isinstance(message, unicode):
                 message = message.encode("utf8")
@@ -64,13 +66,17 @@ def syslog_writer_before_all(self, features, marker):  # pylint: disable=unused-
         """
             Opens the syslog
         """
+        import syslog
+
         syslog.openlog("radish")
         self.log(u"begin run {0}".format(marker))
 
     def syslog_writer_after_all(self, features, marker):  # pylint: disable=unused-argument
         """
             Closes the syslog
         """
+        import syslog
+
         self.log(u"end run {0}".format(marker))
         syslog.closelog()