Tests: Ignore AbstractReviewersPluginTest

This class has no @Test methods.
Test was broken by:
* 0f5f9e9 Refactor ReviewersConfigIT and ReviewersIT

Bug: Issue 12878
Change-Id: I73b9ced3c32c4536fed4cb28251fc6d8652b1e28
diff --git a/src/test/java/com/googlesource/gerrit/plugins/reviewers/AbstractReviewersPluginTest.java b/src/test/java/com/googlesource/gerrit/plugins/reviewers/AbstractReviewersPluginTest.java
index 383dcfd..a8b308a 100644
--- a/src/test/java/com/googlesource/gerrit/plugins/reviewers/AbstractReviewersPluginTest.java
+++ b/src/test/java/com/googlesource/gerrit/plugins/reviewers/AbstractReviewersPluginTest.java
@@ -30,8 +30,10 @@
 import java.util.List;
 import org.eclipse.jgit.junit.TestRepository;
 import org.eclipse.jgit.lib.Config;
+import org.junit.Ignore;
 
 /** Base class for reviewer plugin tests. */
+@Ignore
 public class AbstractReviewersPluginTest extends LightweightPluginDaemonTest {
   @Inject protected ProjectOperations projectOperations;