[Java] Add Java binding and Java test for ReadOptions.

Summary: Add Java binding and test for rocksdb::ReadOptions.

Test Plan:
make rocksdbjava
make jtest

Reviewers: haobo, dhruba, sdong, ankgup87, rsumbaly, swapnilghike, zzbennett

Reviewed By: haobo

CC: leveldb

Differential Revision: https://reviews.facebook.net/D18129

java/org/rocksdb/test/ReadOptionsTest.java

@@ -0,0 +1,45 @@
+// Copyright (c) 2014, Facebook, Inc.  All rights reserved.
+// This source code is licensed under the BSD-style license found in the
+// LICENSE file in the root directory of this source tree. An additional grant
+// of patent rights can be found in the PATENTS file in the same directory.
+
+package org.rocksdb.test;
+
+import java.util.Random;
+import org.rocksdb.*;
+
+public class ReadOptionsTest {
+  static {
+    System.loadLibrary("rocksdbjni");
+  }
+  public static void main(String[] args) {
+    ReadOptions opt = new ReadOptions();
+    Random rand = new Random();
+    { // VerifyChecksums test
+      boolean boolValue = rand.nextBoolean();
+      opt.setVerifyChecksums(boolValue);
+      assert(opt.verifyChecksums() == boolValue);
+    }
+
+    { // FillCache test
+      boolean boolValue = rand.nextBoolean();
+      opt.setFillCache(boolValue);
+      assert(opt.fillCache() == boolValue);
+    }
+
+    { // PrefixSeek test
+      boolean boolValue = rand.nextBoolean();
+      opt.setPrefixSeek(boolValue);
+      assert(opt.prefixSeek() == boolValue);
+    }
+
+    { // Tailing test
+      boolean boolValue = rand.nextBoolean();
+      opt.setTailing(boolValue);
+      assert(opt.tailing() == boolValue);
+    }
+
+    opt.dispose();
+    System.out.println("Passed ReadOptionsTest");
+  }
+}