fixes tests

Author: karimMourra

src/main/java/org/prebid/server/bidder/connatix/ConnatixBidder.java

@@ -175,6 +175,7 @@ private Imp modifyImp(Imp imp, ExtImpConnatix extImpConnatix, String displayMana
                 ? imp.getExt().deepCopy()
                 : mapper.mapper().createObjectNode();
 
+        impExt.remove("bidder");
         impExt.set("connatix", mapper.mapper().valueToTree(extImpConnatix));
 
         return imp.toBuilder()

src/test/resources/org/prebid/server/it/openrtb2/connatix/test-banner-connatix-bid-request.json

@@ -12,6 +12,7 @@
         "connatix": {
           "placementId": "some-placement-id"
         },
+        "tid": "${json-unit.any-string}",
         "gpid": "test-gpid"
       }
     }