Disabled travis message no-member for part of the code

Author: evaherrada

examples/mpr121_piano.py

@@ -39,9 +39,11 @@
 # Note you can optionally change the address of the device:
 #mpr121 = adafruit_mpr121.MPR121(i2c, address=0x91)
 
+#pylint: disable-msg=no-member
 # Setup buzzer PWM output.
 buzzer = pulseio.PWMOut(BUZZER_PIN, duty_cycle=TONE_OFF_DUTY, frequency=440,
                         variable_frequency=True)
+#pylint: disable-msg=no-member
 
 last_note = None
 while True: