Export the nicparams too during instance export
Export the nicparams too during instance export

The patch tries to export all params (based on the dict defined in
constants), using None for missing keys.

Signed-off-by: Iustin Pop <acf83a5274f31a43af6b914614365999469c1a31@google.com>
Reviewed-by: Michael Hanselmann <68b67885ff74281219b4a4be33cc20fd45078d7c@google.com>

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