AbstractIndexTests: Provide default configureIndex method implementation

Provide a default implementation for that method so no longer make it
abstract. Remove the as-default overriding methods from sub-classes. No
longer declare that method as throwing the unused Exception type(s).

(cherry picked from commit f27975aaa5)

Change-Id: I1986c55e264d0ff505a167bad05c1dec1c3dd1bc

javatests/com/google/gerrit/acceptance/pgm/ElasticReindexIT.java

@@ -41,7 +41,7 @@ public class ElasticReindexIT extends AbstractReindexTests {
   }
 
   @Override
-  public void configureIndex(Injector injector) throws Exception {
+  public void configureIndex(Injector injector) {
     createAllIndexes(injector);
   }
 

javatests/com/google/gerrit/acceptance/ssh/AbstractIndexTests.java

@@ -45,7 +45,7 @@ public abstract class AbstractIndexTests extends AbstractDaemonTest {
   private RegistrationHandle changeIndexedCounterHandle;
 
   /** @param injector injector */
-  public abstract void configureIndex(Injector injector) throws Exception;
+  public void configureIndex(Injector injector) {}
 
   @Before
   public void addChangeIndexedCounter() {

javatests/com/google/gerrit/acceptance/ssh/ElasticIndexIT.java

@@ -40,7 +40,7 @@ public class ElasticIndexIT extends AbstractIndexTests {
   }
 
   @Override
-  public void configureIndex(Injector injector) throws Exception {
+  public void configureIndex(Injector injector) {
     createAllIndexes(injector);
   }
 }

javatests/com/google/gerrit/acceptance/ssh/IndexIT.java

@@ -14,10 +14,4 @@
 
 package com.google.gerrit.acceptance.ssh;
 
-import com.google.inject.Injector;
-
-public class IndexIT extends AbstractIndexTests {
-
-  @Override
-  public void configureIndex(Injector injector) throws Exception {}
-}
+public class IndexIT extends AbstractIndexTests {}