Fix python examples to use read-write conn
Fix python examples to use read-write conn

* docs/examples/python/domstart.py python/tests/create.py:
The two example were broken as they needed full-access connection
but only opened read-only connections

cardoe/libvirt-python,libvirt/libvirt-python,cardoe/libvirt-python,cardoe/libvirt-python,libvirt/libvirt-python,libvirt/libvirt-python