tests: move output from CI results and put in log

tests: move output from CI results and put in log

NAT session details are output to the test results.

Twice NAT44                                                              OK
Acquire twice NAT44 addresses from interface                             OK
21:10:42,661 NAT44 sessions:
-------- thread 0 vpp_main: 1 sessions --------
  172.16.1.2: 0 dynamic translations, 1 static translations
    i2o 172.16.1.2 proto tcp port 8080 fib 0
    o2i 10.0.0.3 proto tcp port 80 fib 0
       external host o2i 172.16.2.2:4567 i2o 10.0.1.3:42296
       index 1869
       last heard 97.99
       total pkts 2, total bytes 80
       static translation
       load-balancing
       twice-nat

Twice NAT44 local service load balancing                                 OK
NAT44 translate packet with unknown protocol                             OK

Type: test

Change-Id: I932a4a1133d597bb82da6e04f2ea833094a481da
Signed-off-by: Paul Vinciguerra <pvinci@vinciconsulting.com>