'Removes nodes from this node\'s /etc/exportfs
nodes - list of nodes to stop
Example:
$ node.remove_export_fs_to_nodes(nodes=[node1,node2])'

def stop_exporting_fs_to_nodes(self, nodes, paths=None):

    if paths:
        regex = '|'.join(['    '.join([path, node.alias]) for path in paths for node in nodes])
    else:
        regex = '|'.join([n.alias for n in nodes])
    self.ssh.remove_lines_from_file('/etc/exports', regex)
    self.ssh.execute('exportfs    -fra')
