added attenuator serial function

libs/lanforge/lf_tests.py

@@ -42,6 +42,7 @@ from csv_to_influx import CSVtoInflux
 from influx2 import RecordInflux
 from lf_multipsk import MultiPsk
 from lf_rvr_test import RvrTest
+from attenuator_serial import AttenuatorSerial
 
 
 class RunTest:
@@ -752,6 +753,14 @@ class RunTest:
         influx.glob()
         return self.msthpt_obj
 
+    def attenuator_serial(self):
+        self.obj = AttenuatorSerial(
+            lfclient_host=self.lanforge_ip,
+            lfclient_port=self.lanforge_port
+        )
+        val = self.obj.show()
+        return val
+
 
 if __name__ == '__main__':
     influx_host = "influx.cicd.lab.wlan.tip.build"