fix comments

Author: przemkaczmarek

src/main/java/org/prebid/server/bidder/eplanning/EplanningBidder.java

@@ -396,7 +396,7 @@ private static BidderBid mapToBidderBid(HbResponseSpace hbResponseSpace, HbRespo
                         .price(new BigDecimal(hbResponseAd.getPrice()))
                         .adm(hbResponseAd.getAdM())
                         .crid(hbResponseAd.getCrId())
-                        .adomain(hbResponseAd.getAdomain())
+                        .adomain(Collections.singletonList(hbResponseAd.getAdom()))
                         .w(hbResponseAd.getWidth())
                         .h(hbResponseAd.getHeight())
                         .build(),

src/main/java/org/prebid/server/bidder/eplanning/model/HbResponseAd.java

@@ -4,8 +4,6 @@
 import lombok.Builder;
 import lombok.Value;
 
-import java.util.List;
-
 @Builder
 @Value
 public class HbResponseAd {
@@ -25,8 +23,8 @@ public class HbResponseAd {
     @JsonProperty("crid")
     String crId;
 
-    @JsonProperty("adomain")
-    List<String> adomain;
+    @JsonProperty()
+    String adom;
 
     @JsonProperty("w")
     Integer width;

src/test/java/org/prebid/server/bidder/eplanning/EplanningBidderTest.java

@@ -615,7 +615,7 @@ public void makeBidsShouldReturnBannerBidWithExpectedFields() throws JsonProcess
                                         .price("3.3")
                                         .adM("some-adm")
                                         .crId("CR-ID")
-                                        .adomain(List.of("test.com"))
+                                        .adom("test.com")
                                         .width(500)
                                         .height(300)
                                         .build()))))));
@@ -655,7 +655,7 @@ public void makeBidsShouldReturnBannerBidIfMissingAdunitCode() throws JsonProces
                                         .price("3.3")
                                         .adM("some-adm")
                                         .crId("CR-ID")
-                                        .adomain(List.of("test.com"))
+                                        .adom("test.com")
                                         .width(1)
                                         .height(1)
                                         .build()))))));

src/test/resources/org/prebid/server/it/openrtb2/eplanning/test-eplanning-bid-response-1.json

@@ -9,9 +9,7 @@
           "adm": "<div>test</div>",
           "crid": "crid",
           "id": "imp_id",
-          "adomain": [
-            "test.com"
-          ],
+          "adom": "test.com",
           "w": 600,
           "h": 300
         }