@After
  public void tearDown() throws Exception {
    LlapBaseInputFormat.closeAll();
    hs2Conn.close();
  }
Specialize this base class for different serde's/formats
{@link #beforeTest(boolean) beforeTest} should be called
by sub-classes in a {@link org.junit.BeforeClass} initializer
itests/hive-unit/src/test/java/org/apache/hive/jdbc/BaseJdbcWithMiniLlap.java