OPENDJ-3417 Remove several backend-related methods from DirectoryServer class

Nicolas Capponi

03.41.2016 aaf1f09351c43d52009c6b53b93eb153ace8428e

 opendj-server-legacy/src/test/java/org/opends/server/extensions/DefaultEntryCacheTestCase.java

@@ -361,7 +361,8 @@
      cache.toVerboseString());

    TestCaseUtils.initializeTestBackend(false);
    String b = DirectoryServer.getLocalBackend(DN.valueOf("o=test")).getBackendID();
    String b =
        TestCaseUtils.getServerContext().getBackendConfigManager().getLocalBackend(DN.valueOf("o=test")).getBackendID();

    // Spread test entries among all cache levels via default cache.
    for (int i = 0; i < NUMTESTENTRIES; i++) {