Remove the > when navigating into the different config level.

def set_base_prompt(self, *args, **kwargs):
        """Remove the > when navigating into the different config level."""
        cur_base_prompt = super(AlcatelSrosSSH, self).set_base_prompt(*args, **kwargs)
        match = re.search(r"(.*)(>.*)*#", cur_base_prompt)
        if match:
            # strip off >... from base_prompt
            self.base_prompt = match.group(1)
            return self.base_prompt