Add adUnitCode to the imp.ext.prebid exception list

Author: AntoxaAntoxic

src/main/java/org/prebid/server/auction/requestfactory/Ortb2ImplicitParametersResolver.java

@@ -89,7 +89,7 @@ public class Ortb2ImplicitParametersResolver {
     private static final String BIDDER_EXT = "bidder";
 
     private static final Set<String> IMP_EXT_NON_BIDDER_FIELDS =
-            Set.of(PREBID_EXT, "context", "all", "general", "skadn", "data", "gpid", "tid", "ae");
+            Set.of(PREBID_EXT, "context", "all", "general", "skadn", "data", "gpid", "tid", "ae", "adunitcode");
     private static final String OVERRIDE_SOURCE_ID_TEMPLATE = "{{UUID}}";
 
     private final boolean shouldCacheOnlyWinningBids;

src/test/java/org/prebid/server/auction/requestfactory/Ortb2ImplicitParametersResolverTest.java

@@ -1071,6 +1071,7 @@ public void shouldNotMoveBidderParametersToImpExtPrebidBidderWhenAlreadyPresent(
                                         .put("gpid-data", "gpid-value"))
                                 .<ObjectNode>set("tid", mapper.createObjectNode()
                                         .put("tid-data", "tid-value"))
+                                .<ObjectNode>set("adunitcode", TextNode.valueOf("adunticode-value"))
                                 .set("prebid", mapper.createObjectNode()
                                         .<ObjectNode>set("bidder", mapper.createObjectNode()
                                                 .set("bidder2", mapper.createObjectNode().put("param22", "value22")))
@@ -1101,6 +1102,7 @@ public void shouldNotMoveBidderParametersToImpExtPrebidBidderWhenAlreadyPresent(
                                 .put("gpid-data", "gpid-value"))
                         .<ObjectNode>set("tid", mapper.createObjectNode()
                                 .put("tid-data", "tid-value"))
+                        .<ObjectNode>set("adunitcode", TextNode.valueOf("adunticode-value"))
                         .set("prebid", mapper.createObjectNode()
                                 .<ObjectNode>set("bidder", mapper.createObjectNode()
                                         .set("bidder2", mapper.createObjectNode().put("param22", "value22")))
@@ -1133,6 +1135,7 @@ public void shouldMoveBidderParametersToImpExtPrebidBidderWhenNotPresent() {
                                         .put("gpid-data", "gpid-value"))
                                 .<ObjectNode>set("tid", mapper.createObjectNode()
                                         .put("tid-data", "tid-value"))
+                                .<ObjectNode>set("adunitcode", TextNode.valueOf("adunticode-value"))
                                 .set("prebid", mapper.createObjectNode()
                                         .set("storedresult", mapper.createObjectNode().put("id", "storedreq1"))))
                         .build());
@@ -1160,6 +1163,7 @@ public void shouldMoveBidderParametersToImpExtPrebidBidderWhenNotPresent() {
                                 .put("gpid-data", "gpid-value"))
                         .<ObjectNode>set("tid", mapper.createObjectNode()
                                 .put("tid-data", "tid-value"))
+                        .<ObjectNode>set("adunitcode", TextNode.valueOf("adunticode-value"))
                         .set("prebid", mapper.createObjectNode()
                                 .<ObjectNode>set("bidder", mapper.createObjectNode()
                                         .<ObjectNode>set("notBidder", mapper.createObjectNode().put("param1", "value1"))