The MetadefProperty and MetadefObject ORM classes currently specify the
JSON schema columns as type Text. It is preferred to use the
JSONEncodedDict Type Decorator instead. This fix also includes necessary
code changes to remove JSON encoding/decoding that was previously done
in other layers. Fixes for unit tests involving the schema columns are
also included.
Change-Id: I2c574210f8d62c77a438afab83ff80f3e5bd2fe7
Closes-Bug: 1368479