Add new REST endpoint that provides the audit log of a group

Bug: Issue 1479
Change-Id: I59c51964cab1f1ab32f50db8645a09d96d7a0196
Signed-off-by: Edwin Kempin <edwin.kempin@sap.com>

gerrit-reviewdb/src/main/java/com/google/gerrit/reviewdb/client/AccountGroupByIdAud.java

@@ -98,4 +98,16 @@ public final class AccountGroupByIdAud {
     removedBy = deleter;
     removedOn = when;
   }
+
+  public Account.Id getAddedBy() {
+    return addedBy;
+  }
+
+  public Account.Id getRemovedBy() {
+    return removedBy;
+  }
+
+  public Timestamp getRemovedOn() {
+    return removedOn;
+  }
 }

gerrit-reviewdb/src/main/java/com/google/gerrit/reviewdb/client/AccountGroupMemberAudit.java

@@ -103,4 +103,16 @@ public final class AccountGroupMemberAudit {
     removedBy = addedBy;
     removedOn = key.addedOn;
   }
+
+  public Account.Id getAddedBy() {
+    return addedBy;
+  }
+
+  public Account.Id getRemovedBy() {
+    return removedBy;
+  }
+
+  public Timestamp getRemovedOn() {
+    return removedOn;
+  }
 }

gerrit-reviewdb/src/main/java/com/google/gerrit/reviewdb/server/AccountGroupByIdAudAccess.java

@@ -32,4 +32,8 @@ public interface AccountGroupByIdAudAccess extends
   @Query("WHERE key.groupId = ? AND key.includeUUID = ?")
   ResultSet<AccountGroupByIdAud> byGroupInclude(AccountGroup.Id groupId,
       AccountGroup.UUID incGroupUUID) throws OrmException;
+
+  @Query("WHERE key.groupId = ?")
+  ResultSet<AccountGroupByIdAud> byGroup(AccountGroup.Id groupId)
+      throws OrmException;
 }

gerrit-reviewdb/src/main/java/com/google/gerrit/reviewdb/server/AccountGroupMemberAuditAccess.java

@@ -33,4 +33,8 @@ public interface AccountGroupMemberAuditAccess extends
   @Query("WHERE key.groupId = ? AND key.accountId = ?")
   ResultSet<AccountGroupMemberAudit> byGroupAccount(AccountGroup.Id groupId,
       Account.Id accountId) throws OrmException;
+
+  @Query("WHERE key.groupId = ?")
+  ResultSet<AccountGroupMemberAudit> byGroup(AccountGroup.Id groupId)
+      throws OrmException;
 }