Redesign communication mechanism in light of limitations
Redesign communication mechanism in light of limitations

Redesign the communication mechanism in light of implementation
limitations that have recently come up in prototypes using KVM.

Signed-off-by: Jose A. Lopes <0fb9c4f8511df4ec2ae28af879e9d462f6218a2c@google.com>
Reviewed-by: Michele Tartara <05f7077a2c6cbbdc4af4ba42e3ef89a0df846179@google.com>

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