def cli(self, commands):
raise NotImplementedError<EOL>
Will execute a list of commands and return the output in a dictionary format.

Example::

    {
        u'show version and haiku':  u'''Hostname: re0.edge01.arn01
                                        Model: mx480
                                        Junos: 13.3R6.5

                                                Help me, Obi-Wan
                                                I just saw Episode Two
                                                You're my only hope
                                    ''',
        u'show chassis fan'     :   u'''
            Item               Status  RPM     Measurement
            Top Rear Fan       OK      3840    Spinning at intermediate-speed
            Bottom Rear Fan    OK      3840    Spinning at intermediate-speed
            Top Middle Fan     OK      3900    Spinning at intermediate-speed
            Bottom Middle Fan  OK      3840    Spinning at intermediate-speed
            Top Front Fan      OK      3810    Spinning at intermediate-speed
            Bottom Front Fan   OK      3840    Spinning at intermediate-speed'''
    }