MASTER ONLY
    re-loads the handler config XML file.
    This command can only be run if the minion is a 'master' type

    handler : str
        The name of the data import handler.
    host : str (None)
        The solr host to query. __opts__['host'] is default.
    core : str (None)
        The core the handler belongs to.
    verbose : boolean (False)
        Run the command with verbose output.

    Return : dict<str,obj>::

        {'success':boolean, 'data':dict, 'errors':list, 'warnings':list}

    CLI Example:

    .. code-block:: bash

        salt '*' solr.reload_import_config dataimport None music {'clean':True}

def reload_import_config(handler, host=None, core_name=None, verbose=False):
    '''
    MASTER ONLY
    re-loads the handler config XML file.
    This command can only be run if the minion is a 'master' type

    handler : str
        The name of the data import handler.
    host : str (None)
        The solr host to query. __opts__['host'] is default.
    core : str (None)
        The core the handler belongs to.
    verbose : boolean (False)
        Run the command with verbose output.

    Return : dict<str,obj>::

        {'success':boolean, 'data':dict, 'errors':list, 'warnings':list}

    CLI Example:

    .. code-block:: bash

        salt '*' solr.reload_import_config dataimport None music {'clean':True}
    '''

    # make sure that it's a master minion
    if not _is_master() and _get_none_or_value(host) is None:
        err = [
            'solr.pre_indexing_check can only be called by "master" minions']
        return _get_return_dict(False, err)

    if _get_none_or_value(core_name) is None and _check_for_cores():
        err = ['No core specified when minion is configured as "multi-core".']
        return _get_return_dict(False, err)

    params = ['command=reload-config']
    if verbose:
        params.append("verbose=true")
    url = _format_url(handler, host=host, core_name=core_name, extra=params)
    return _http_request(url)