Add a new reactor

    CLI Example:

    .. code-block:: bash

        salt-run reactor.add 'salt/cloud/*/destroyed' reactors='/srv/reactor/destroy/*.sls'

def add(event, reactors, saltenv='base', test=None):
    '''
    Add a new reactor

    CLI Example:

    .. code-block:: bash

        salt-run reactor.add 'salt/cloud/*/destroyed' reactors='/srv/reactor/destroy/*.sls'
    '''
    if isinstance(reactors, string_types):
        reactors = [reactors]

    sevent = salt.utils.event.get_event(
            'master',
            __opts__['sock_dir'],
            __opts__['transport'],
            opts=__opts__,
            listen=True)

    master_key = salt.utils.master.get_master_key('root', __opts__)

    __jid_event__.fire_event({'event': event,
                              'reactors': reactors,
                              'key': master_key},
                             'salt/reactors/manage/add')

    res = sevent.get_event(wait=30, tag='salt/reactors/manage/add-complete')
    return res['result']