Clone current index

           All entries of the current index will be copied into the newly
           created one named `new_indexname`

           :param index_conf: Configuration to be used in the new index creation.
                              This param will be passed directly to :py:func:`DB.create_index`

def clone_index(self, new_indexname, index_conf=None):
        '''Clone current index

           All entries of the current index will be copied into the newly
           created one named `new_indexname`

           :param index_conf: Configuration to be used in the new index creation.
                              This param will be passed directly to :py:func:`DB.create_index`
        '''
        log.debug("Cloning index '{}' into '{}'".format(self.index_name, new_indexname))
        self.create_index(indexname=new_indexname, index_conf=index_conf)
        reindex(self.es, self.index_name, new_indexname)