Bbs tests improvements

Issue-ID: INT-1100
Change-Id: I17ad2f3a270cddeaad239d23756500a08e91a200
Signed-off-by: Joanna Jeremicz <joanna.jeremicz@nokia.com>
diff --git a/tests/dcaegen2/prh-testcases/assets/re-registration/expected-pnf-update-event.json b/tests/dcaegen2/prh-testcases/assets/re-registration/expected-pnf-update-event.json
index d178779..48341b6 100644
--- a/tests/dcaegen2/prh-testcases/assets/re-registration/expected-pnf-update-event.json
+++ b/tests/dcaegen2/prh-testcases/assets/re-registration/expected-pnf-update-event.json
@@ -1,7 +1,8 @@
 [
   {
     "additionalFields": {
-      "attachment-point": "another-link"
+      "attachment-point": "another-link",
+      "some-param": "param"
     },
     "correlationId": "NOK6061ZW9"
   }