Add tests specific to the user/kernelspace access feature
Add tests specific to the user/kernelspace access feature

Check that the validation procedures don't accept invalid values
and also don't choke on valid values.

Signed-off-by: Santi Raffa <6a214b96de92f36f05379f829a80c82d50682e4c@google.com>
Reviewed-by: Thomas Thrainer <98bdeac947eb8ca18146e9ce7f092788ec242cd1@google.com>

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