tests: bgp_l3vpn_to_bgp_vrf test needed to correct order

tests: bgp_l3vpn_to_bgp_vrf test needed to correct order

The bgp_l3vpn_to_bgp_vrf test is looking for a prefix
on multiple routers that the ordered received is non-deterministic.
As such the regex's are failing occassionaly when the
route is received in an unexpected order.

One possible order:
(#89) scripts/check_routes.py:120 COMMAND:ce3:vtysh -c "show bgp ipv4 uni 6.0.1.0":2 available, best .*192.168.1.1.* Local.* 99.0.0.3 from 0.0.0.0 .99.0.0.3.* Origin IGP, metric 200, localpref 50, weight 32768, valid, sourced, local, best .Weight.* Community: 0:67.* Extended Community: RT:89:123.* Large Community: 12:34:56.* Local.* 192.168.1.1 from 192.168.1.1 .192.168.1.1.* Origin IGP, metric 98, localpref 123, valid, internal.* Community: 0:67.* Extended Community: RT:52:100 RT:89:123.* Large Community: 12:34:56:pass:Redundant route 1 details c:
COMMAND OUTPUT:BGP routing table entry for 6.0.1.0/24^M
Paths: (2 available, best #1, table default)^M
  Advertised to non peer-group peers:^M
  192.168.1.1^M
  Local^M
    99.0.0.3 from 0.0.0.0 (99.0.0.3)^M
      Origin IGP, metric 200, localpref 50, weight 32768, valid, sourced, local, best (Weight)^M
      Community: 0:67^M
      Extended Community: RT:89:123^M
      Large Community: 12:34:56^M
      Last update: Wed Oct  7 11:12:22 2020^M
  Local^M
    192.168.1.1 from 192.168.1.1 (192.168.1.1)^M
      Origin IGP, metric 98, localpref 123, valid, internal^M
      Community: 0:67^M
      Extended Community: RT:52:100 RT:89:123^M
      Large Community: 12:34:56^M
      Last update: Wed Oct  7 11:12:41 2020:
R:89   ce3    Redundant route 1 details c                              1    0

Second possible order:
(#89) scripts/check_routes.py:120 COMMAND:ce3:vtysh -c "show bgp ipv4 uni 6.0.1.0":2 available, best .*192.168.1.1.* Local.* 99.0.0.3 from 0.0.0.0 .99.0.0.3.* Origin IGP, metric 200, localpref 50, weight 32768, valid, sourced, local, best .Weight.* Community: 0:67.* Extended Community: RT:89:123.* Large Community: 12:34:56.* Local.* 192.168.1.1 from 192.168.1.1 .192.168.1.1.* Origin IGP, metric 98, localpref 123, valid, internal.* Community: 0:67.* Extended Community: RT:52:100 RT:89:123.* Large Community: 12:34:56:pass:Redundant route 1 details c:
COMMAND OUTPUT:BGP routing table entry for 6.0.1.0/24^M
Paths: (2 available, best #2, table default)^M
  Advertised to non peer-group peers:^M
  192.168.1.1^M
  Local^M
    192.168.1.1 from 192.168.1.1 (192.168.1.1)^M
      Origin IGP, metric 98, localpref 123, valid, internal^M
      Community: 0:67^M
      Extended Community: RT:52:100 RT:89:123^M
      Large Community: 12:34:56^M
      Last update: Wed Oct  7 11:14:45 2020^M
  Local^M
    99.0.0.3 from 0.0.0.0 (99.0.0.3)^M
      Origin IGP, metric 200, localpref 50, weight 32768, valid, sourced, local, best (Weight)^M
      Community: 0:67^M
      Extended Community: RT:89:123^M
      Large Community: 12:34:56^M
      Last update: Wed Oct  7 11:14:27 2020:
R:89   ce3    Redundant route 1 details c                              0    1

BGP displays the paths in the order received since it's just a linked list.
For this test modify/add the luCommands to track that we may
receive the paths in a non-deterministic order.

Signed-off-by: Donald Sharp <sharpd@nvidia.com>
Signed-off-by: Quentin Young <qlyoung@nvidia.com>