[libteam]: Fixing the port add issue

[pavel-shirshov]

- What I did
Fixed a bug #3725 . Which caused following log output. The bug was observed, because team_refresh() expect to see the port enabled, but the port is being enabled later by team_set_port_enabled().

Ethernet50: Failed to find "enabled" option.
get_ifinfo_list: check_call_change_handers failed
Failed to get interface information list.
Failed to refresh interface information list.
Ethernet50: Team refresh failed.

    /* refresh ports from the kernel */
    err = team_refresh(ctx->th);
    if (err) {
        teamd_log_err("%s: Team refresh failed.", tdport->ifname);
        goto timeout_callback_del;
    }

    /* Newly added ports are disabled */
    err = team_set_port_enabled(ctx->th, tdport->ifindex, false);
    if (err) {
        teamd_log_err("%s: Failed to disable port.", tdport->ifname);
        if (!TEAMD_ENOENT(err))
            goto timeout_callback_del;
    }

- How I did it
I run team_set_port_enabled() function before the team_refresh() function

- How to verify it
Build libteam and run on the switch

- Description for the changelog

- A picture of a cute animal (not mandatory but encouraged)

[lguohan]

do we need this for 201811 branch?

[pavel-shirshov]

Yes @lguohan if it fixes the issue.
I still can't reproduce it on my dut

[stepanblyschak]

@pavel-shirshov @lguohan Still observe the issue after 2 iterations of warm reboot with this PR, on 201811 can't reproduce.

[pavel-shirshov]

@stepanblyschak Can you please share logs?