Do not enforce type validation in the submitted data

[jnm]

Forms can have many versions. KoBoCAT does not know about any version except the latest, and yet it de-facto enforces type validation for at least geopoint because it will fail and return a 500 if non-conforming data is submitted:

kobocat/onadata/apps/logger/models/instance.py

Line 310 in d79b0fd

lat, lng = geometry[0:2]

KoBoCAT should accept everything—within reason, of course, given security and performance considerations. Dealing with non-conforming data based on the type should be the purview of KPI or formpack.

Discussion: https://chat.kobotoolbox.org/#narrow/stream/6-Support/topic/500.20error.20with.20invalid.20GPS.20coordinates