Fix spelling mistake in constants.py
Fix spelling mistake in constants.py

Of course instance creation don't have any modem, and the comment was just
talking about modes. Sorry to everybody expecting whistles.

Reviewed-by: imsnah



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