Replace Lombok Getter with getX() methods on GitHubGroup

The GitHubGroup is a base class of all groups implemented
in the GitHub plugin and the extra boilerplate generated
by removing Lombok usage is limited and justified.

Change-Id: I9c6f5f42df88741d23f7c8a551952ebb343cf055

github-plugin/src/main/java/com/googlesource/gerrit/plugins/github/group/GitHubGroup.java

diff --git a/github-plugin/src/main/java/com/googlesource/gerrit/plugins/github/group/GitHubGroup.java b/github-plugin/src/main/java/com/googlesource/gerrit/plugins/github/group/GitHubGroup.java
index ba9581c..68b1a7a 100644
--- a/github-plugin/src/main/java/com/googlesource/gerrit/plugins/github/group/GitHubGroup.java
+++ b/github-plugin/src/main/java/com/googlesource/gerrit/plugins/github/group/GitHubGroup.java
@@ -14,17 +14,17 @@
 
 package com.googlesource.gerrit.plugins.github.group;
 
+import com.google.gerrit.entities.AccountGroup;
 import com.google.gerrit.entities.AccountGroup.UUID;
 import com.google.gerrit.entities.GroupDescription.Basic;
-import lombok.Getter;
 
 public abstract class GitHubGroup implements Basic {
   public static final String UUID_PREFIX = "github:";
   public static final String NAME_PREFIX = "github/";
 
-  @Getter protected final UUID groupUUID;
+  protected final UUID groupUUID;
 
-  @Getter protected final String url;
+  protected final String url;
 
   GitHubGroup(UUID groupUUID, String url) {
     this.groupUUID = groupUUID;
@@ -35,4 +35,14 @@
   public String getEmailAddress() {
     return "";
   }
+
+  @Override
+  public AccountGroup.UUID getGroupUUID() {
+    return groupUUID;
+  }
+
+  @Override
+  public String getUrl() {
+    return url;
+  }
 }