BiophysicalApi.get_neuronal_models doesn't find perisomatic models

[tmchartrand]

It seems that the model type/template id for perisomatic models is off (missing a 0), where specified in
BiophysicalApi.BIOPHYSICAL_MODEL_TYPE_IDS. I tested out a fix with the proper id (329230710 vs 32923071), will submit a PR.

Tested with the following code:

from allensdk.api.queries.biophysical_api import BiophysicalApi
bp = BiophysicalApi()
specimen_ids = [490387590, 386049446]
bp.get_neuronal_models(specimen_ids)

Without the fix (current master branch), this returns only a single all-active model for specimen 386049446. With the fix, it returns three records, with perisomatic models for both specimens.

[nicain]

@tmchartrand Thanks for the find, and for a PR! Please CC @dyf to triage a reviewer once you get it submitted.