Update due to Gerrit core change

I16aa48a608 renamed the AddReviewerInput entity to ReviewerInput, so we
must change it in the plugin as well.

Change-Id: I89b72439f45214dbc671edbb7522435fc617b648
diff --git a/src/main/java/com/googlesource/gerrit/plugins/reviewers/AddReviewers.java b/src/main/java/com/googlesource/gerrit/plugins/reviewers/AddReviewers.java
index 43db627..5375481 100644
--- a/src/main/java/com/googlesource/gerrit/plugins/reviewers/AddReviewers.java
+++ b/src/main/java/com/googlesource/gerrit/plugins/reviewers/AddReviewers.java
@@ -17,8 +17,8 @@
 import com.google.common.flogger.FluentLogger;
 import com.google.gerrit.entities.Account;
 import com.google.gerrit.extensions.api.GerritApi;
-import com.google.gerrit.extensions.api.changes.AddReviewerInput;
 import com.google.gerrit.extensions.api.changes.ReviewInput;
+import com.google.gerrit.extensions.api.changes.ReviewerInput;
 import com.google.gerrit.extensions.client.ReviewerState;
 import com.google.gerrit.extensions.common.ChangeInfo;
 import com.google.gerrit.extensions.restapi.RestApiException;
@@ -92,12 +92,12 @@
       ReviewInput in = new ReviewInput();
       in.reviewers = new ArrayList<>(reviewers.size() + ccs.size());
       for (Account.Id account : reviewersToAdd) {
-        AddReviewerInput addReviewerInput = new AddReviewerInput();
+        ReviewerInput addReviewerInput = new ReviewerInput();
         addReviewerInput.reviewer = account.toString();
         in.reviewers.add(addReviewerInput);
       }
       for (Account.Id account : ccsToAdd) {
-        AddReviewerInput input = new AddReviewerInput();
+        ReviewerInput input = new ReviewerInput();
         input.state = ReviewerState.CC;
         input.reviewer = account.toString();
         in.reviewers.add(input);
diff --git a/src/test/java/com/googlesource/gerrit/plugins/reviewers/ReviewersIT.java b/src/test/java/com/googlesource/gerrit/plugins/reviewers/ReviewersIT.java
index 02f4902..64ac429 100644
--- a/src/test/java/com/googlesource/gerrit/plugins/reviewers/ReviewersIT.java
+++ b/src/test/java/com/googlesource/gerrit/plugins/reviewers/ReviewersIT.java
@@ -26,8 +26,8 @@
 import com.google.gerrit.acceptance.TestPlugin;
 import com.google.gerrit.entities.Account;
 import com.google.gerrit.entities.BranchNameKey;
-import com.google.gerrit.extensions.api.changes.AddReviewerInput;
 import com.google.gerrit.extensions.api.changes.ReviewInput;
+import com.google.gerrit.extensions.api.changes.ReviewerInput;
 import com.google.gerrit.extensions.client.ChangeStatus;
 import com.google.gerrit.extensions.client.ReviewerState;
 import com.google.gerrit.extensions.common.ChangeInfo;
@@ -157,7 +157,7 @@
 
   private void addReviewer(String changeId, TestAccount user, ReviewerState state)
       throws Exception {
-    AddReviewerInput input = new AddReviewerInput();
+    ReviewerInput input = new ReviewerInput();
     input.reviewer = user.id().toString();
     input.state = state;
     gApi.changes().id(changeId).addReviewer(input);