Python bindings fail to add the default version for sqlite records

[calinvoichita]

This commit Set database version only for the database records, not everything, moved setting the default database version to the command line and led there to be a difference between the command line and the python bindings.

As such, generating the metadata with the python bindings leads to the database version to be set to 0. In this case yum ignores it and generates its own which leads to wasted resources in time and disk space.