Update arista.py

Author: ericgriffin

modules/devices/arista.py

@@ -91,6 +91,7 @@ def get_config(self, config_type):
             while not self.channel.recv_ready():
                 time.sleep(5)
             output += self.channel.recv(1024)
+            time.sleep(3)
             self.channel.send(self.device.enable_password + "\n")
             while not self.channel.recv_ready():
                 time.sleep(5)