Revert "orchagent: Updating the route next hop ID also sets action to…

… forward" (sonic-net#138)

This change breaks the latest test as the current SAI implementation doesn't support
the mid-state that the route with packet action DROP is set with next hop ID and packet
action FORWARD by two steps. The implementation also prevents removing the default route
and create a new route instead. After the SAI implementation is fixed, this change
will be re-introduced.

ref: opencomputeproject/SAI#253

orchagent/routeorch.cpp

@@ -440,7 +440,6 @@ bool RouteOrch::addRoute(IpPrefix ipPrefix, IpAddresses nextHops)
     }
     else
     {
-        /* Set the next hop ID to a new value */
         sai_status_t status = sai_route_api->set_route_attribute(&route_entry, &route_attr);
         if (status != SAI_STATUS_SUCCESS)
         {
@@ -449,18 +448,6 @@ bool RouteOrch::addRoute(IpPrefix ipPrefix, IpAddresses nextHops)
             return false;
         }
 
-        /* Set the packet action to forward */
-        route_attr.id = SAI_ROUTE_ATTR_PACKET_ACTION;
-        route_attr.value.s32 = SAI_PACKET_ACTION_FORWARD;
-
-        status = sai_route_api->set_route_attribute(&route_entry, &route_attr);
-        if (status != SAI_STATUS_SUCCESS)
-        {
-            SWSS_LOG_ERROR("Failed to set route %s with packet action forward, %d",
-                           ipPrefix.to_string().c_str(), status);
-            return false;
-        }
-
         /* Increase the ref_count for the next hop (group) entry */
         increaseNextHopRefCount(nextHops);