Sets targets.

def get_targets(self):
        """Sets targets."""
        if self.xml_root.tag == "testcases":
            self.submit_target = self.config.get("testcase_taget")
            self.queue_url = self.config.get("testcase_queue")
            self.log_url = self.config.get("testcase_log")
        elif self.xml_root.tag == "testsuites":
            self.submit_target = self.config.get("xunit_target")
            self.queue_url = self.config.get("xunit_queue")
            self.log_url = self.config.get("xunit_log")
        elif self.xml_root.tag == "requirements":
            self.submit_target = self.config.get("requirement_target")
            self.queue_url = self.config.get("requirement_queue")
            self.log_url = self.config.get("requirement_log")
        else:
            raise Dump2PolarionException("Failed to submit to Polarion - submit target not found")