Moved 'tot_tours' from nm tour frequency script to alternatives file

[JoeJimFlood]

To resolve #656

[dhensle]

I ran into an issue with this change awhile ago while doing some estimation work. Canonical_ids (used to create reproducible tour/trip ids) calculates IDs based on purposes specified in the alts file. If tot_tours is listed in the alt file, it is treated as another purpose. Thus, adding a column to input alts will change IDs and break estimation mode.

In other words, I believe this change should not pass the CI testing for estimation mode.

I think we have a couple of options:

1. Explicitly specify the alts for canonical IDs in the example model(s) and keep the change as-is.
2. Update canonical IDs to avoid tot_tours being counted as a separate purpose.
3. Push this issue into data model dev task instead of phase 8. (could be done regardless of whether 1 or 2 is selected.)

[jpn--]

I chose option 2, which was relatively easy. A more comprehensive solution is deferred to whenever we address a "data model".

I ran into an issue with this change awhile ago while doing some estimation work. Canonical_ids (used to create reproducible tour/trip ids) calculates IDs based on purposes specified in the alts file. If tot_tours is listed in the alt file, it is treated as another purpose. Thus, adding a column to input alts will change IDs and break estimation mode.

In other words, I believe this change should not pass the CI testing for estimation mode.

I think we have a couple of options:

1. Explicitly specify the alts for canonical IDs in the example model(s) and keep the change as-is.
2. Update canonical IDs to avoid tot_tours being counted as a separate purpose.
3. Push this issue into data model dev task instead of phase 8. (could be done regardless of whether 1 or 2 is selected.)