ethdev: add group jump action

ethdev: add group jump action

Add jump action type which defines an action which allows a matched
flow to be redirect to the specified group. This allows physical and
logical flow table/group hierarchies to be defined through rte_flow.

This breaks ABI compatibility for the following public functions (as it
modifes the ordering of the rte_flow_action_type enumeration):

- rte_flow_copy()
- rte_flow_create()
- rte_flow_query()
- rte_flow_validate()

Add support for specification of new JUMP action to testpmd's flow
cli, and update the testpmd documentation to describe this new
action.

Signed-off-by: Declan Doherty <declan.doherty@intel.com>