Description of problem:
APIv3 doesn't correctly populate product_info.version

This snippet can be used to reproduce the issue:
 import ovirtsdk.api
 
 fqdn='enginevm.localdomain'
 username='admin@internal'
 password='password'
 
 engine_api = ovirtsdk.api.API(
     url='https://{fqdn}/ovirt-engine/api'.format(
         fqdn=fqdn,
     ),
     username=username,
     password=password,
     insecure=True,
 )
 
 print(engine_api.get_product_info().version.full_version)
 print(engine_api.get_product_info().get_full_version())


Which prints
None
4.1.0-0.2.master.20161210231201.git26a385e.el7.centos

so the user has to use different code to check the engine version against different engine versions.


Version-Release number of selected component (if applicable):
4.1.0-0.2.master.20161210231201.git26a385e.el7.centos

How reproducible:
100%

Steps to Reproduce:
1. run the attached script
2.
3.

Actual results:
the user has to use different code to check the engine version against different engine versions

Expected results:
engine_api.get_product_info().version.full_version should work

Additional info: