Annotate abstract test classes with @Ignore

According to I1a9b6ed53 Buck's test runner doesn't skip abstract
classes, but will if they are annotated as @Ignore.

This may not be true any more; Buck seems to be marking the classes as
NOTESTS.

Mark them as @Ignore anyway, even if it's only as documentation.

Also make classes abstract.

Change-Id: Ifc8deef60037bbf0b446542498ba9055037bf5d9

gerrit-pgm/src/test/java/com/google/gerrit/pgm/init/InitTestCase.java

@@ -15,10 +15,12 @@
 package com.google.gerrit.pgm.init;
 
 import org.eclipse.jgit.junit.LocalDiskRepositoryTestCase;
+import org.junit.Ignore;
 
 import java.io.IOException;
 import java.nio.file.Path;
 
+@Ignore
 public abstract class InitTestCase extends LocalDiskRepositoryTestCase {
   protected Path newSitePath() throws IOException {
     return createWorkRepository().getWorkTree().toPath().resolve("test_site");

gerrit-server/src/test/java/com/google/gerrit/server/index/FakeIndex.java

@@ -24,6 +24,9 @@ import com.google.gerrit.server.query.change.QueryOptions;
 import com.google.gwtorm.server.OrmException;
 import com.google.gwtorm.server.ResultSet;
 
+import org.junit.Ignore;
+
+@Ignore
 class FakeIndex implements ChangeIndex {
   static Schema<ChangeData> V1 = new Schema<>(1,
     ImmutableList.<FieldDef<ChangeData, ?>> of(

gerrit-server/src/test/java/com/google/gerrit/server/index/FakeQueryBuilder.java

@@ -20,6 +20,9 @@ import com.google.gerrit.server.query.change.ChangeData;
 import com.google.gerrit.server.query.change.ChangeQueryBuilder;
 import com.google.gwtorm.server.OrmException;
 
+import org.junit.Ignore;
+
+@Ignore
 public class FakeQueryBuilder extends ChangeQueryBuilder {
   FakeQueryBuilder(IndexCollection indexes) {
     super(

gerrit-server/src/test/java/com/google/gerrit/server/notedb/AbstractChangeNotesTest.java

@@ -71,11 +71,13 @@ import org.eclipse.jgit.lib.Repository;
 import org.eclipse.jgit.revwalk.RevWalk;
 import org.junit.After;
 import org.junit.Before;
+import org.junit.Ignore;
 
 import java.sql.Timestamp;
 import java.util.TimeZone;
 
-public class AbstractChangeNotesTest extends GerritBaseTests {
+@Ignore
+public abstract class AbstractChangeNotesTest extends GerritBaseTests {
   private static final TimeZone TZ =
       TimeZone.getTimeZone("America/Los_Angeles");
 

gerrit-server/src/test/java/com/google/gerrit/server/query/PredicateTest.java

@@ -16,7 +16,10 @@ package com.google.gerrit.server.query;
 
 import com.google.gerrit.testutil.GerritBaseTests;
 
-public class PredicateTest extends GerritBaseTests {
+import org.junit.Ignore;
+
+@Ignore
+public abstract class PredicateTest extends GerritBaseTests {
   protected static final class TestPredicate extends OperatorPredicate<String> {
     protected TestPredicate(String name, String value) {
       super(name, value);

gerrit-server/src/test/java/com/google/gerrit/server/tools/hooks/HookTestCase.java

@@ -60,6 +60,7 @@ import org.eclipse.jgit.junit.LocalDiskRepositoryTestCase;
 import org.eclipse.jgit.lib.Repository;
 import org.junit.After;
 import org.junit.Before;
+import org.junit.Ignore;
 
 import java.io.File;
 import java.io.FileOutputStream;
@@ -69,6 +70,7 @@ import java.net.URL;
 import java.util.List;
 import java.util.Map;
 
+@Ignore
 public abstract class HookTestCase extends LocalDiskRepositoryTestCase {
   protected Repository repository;
   private final Map<String, File> hooks = Maps.newTreeMap();

gerrit-server/src/test/java/com/google/gerrit/testutil/GerritBaseTests.java

@@ -14,10 +14,12 @@
 
 package com.google.gerrit.testutil;
 
+import org.junit.Ignore;
 import org.junit.Rule;
 import org.junit.rules.ExpectedException;
 
-public class GerritBaseTests {
+@Ignore
+public abstract class GerritBaseTests {
   @Rule
   public ExpectedException exception = ExpectedException.none();
 }