[ovs/dpdk] Parameterize node-specific compute args

[ovs/dpdk] Parameterize node-specific compute args

- node-specific parameters (nova pinning, hugepages, dpdk) should be
  configurable via IDF, on a per-node basis;
- keep default settings for lf-pod2, with and without DPDK,
  override them for virtual deploys via local-virtual1 IDF;
- leave neutron_tenant_* vars hardcoded for now, as they are required
  on both ctl and cmp nodes - this way we'll deal stricly with
  cmp params, so we can nicely pass them via config.yml to reclass
  per-node (and not per-role), allowing mixed computes later;
- add compute params for ovs/odl-noha, preparing them for
  deployment on baremetal later.

JIRA: ARMBAND-343

Change-Id: I89a58b9565679ab3882d85f07ae817690ae85c67
Signed-off-by: Cristina Pauna <cristina.pauna@enea.com>