Fix lint errors in 'cfgupgrade12'
Fix lint errors in 'cfgupgrade12'

This time a 'too-many-branches' error.

Signed-off-by: Helga Velroyen <2d0126b1ec6f9ec5cbec4a7012aa14faeaef10f5@google.com>
Reviewed-by: Jose Lopes <0fb9c4f8511df4ec2ae28af879e9d462f6218a2c@google.com>

leshchevds/ganeti,ganeti/ganeti,ganeti/ganeti,grnet/snf-ganeti,mbakke/ganeti,yiannist/ganeti,onponomarev/ganeti,bitemyapp/ganeti,onponomarev/ganeti,ganeti-github-testing/ganeti-test-1,leshchevds/ganeti,apyrgio/ganeti,ganeti-github-testing/ganeti-test-1,dimara/ganeti,yiannist/ganeti,yiannist/ganeti,mbakke/ganeti,apyrgio/ganeti,grnet/snf-ganeti,andir/ganeti,andir/ganeti,ganeti/ganeti,bitemyapp/ganeti,leshchevds/ganeti,andir/ganeti,dimara/ganeti,mbakke/ganeti