[sliceable_switch] error: Duplicated path found.

[r-mibu]

After I changed a slice definition/configuration while running sliceable_switch,
I got some error like:
Thu Jun 7 15:20:54 2012 [error] Duplicated path found.
Thu Jun 7 15:20:54 2012 [error] Failed to set up path.

I guess this error caused by path_entries that are left after load_slice_definitions_from_sqlite().
Path_entries are added at setup_path() (sliceable_switch.c 220),
but not deleted when delete_all_flows() (slice.c 547).

Related Commit:
ac2adec
flow_manager supported

I'm not sure that we should add delete_path_db() and create_path_db() after delete_all_flows(),
or modify "delete_affected_flows()".

[r-mibu]

I checked that this bug has been fixed.