Fixed 6 tests due to ordering problem - getDeclaredFields()

The following six tests fail because the getDeclaredFields() used in the ObjectInspectorUtils.java doesn't maintain a constant order. It is mentioned in the [documentation]https://docs.oracle.com/javase/8/docs/api/java/lang/Class.html#getDeclaredFields--

1. org.apache.hadoop.hive.serde2.lazy.TestLazySimpleSerDe.testSerDeParameters_
2.org.apache.hadoop.hive.serde2.objectinspector.TestObjectInspectorUtils.testObjectInspectorUtils
3.org.apache.hadoop.hive.serde2.binarysortable.TestBinarySortableSerDe.testBinarySortableSerDe
4.org.apache.hadoop.hive.serde2.columnar.TestLazyBinaryColumnarSerDe.testLazyBinaryColumnarSerDeWithEmptyBinary
5.org.apache.hadoop.hive.serde2.columnar.TestLazyBinaryColumnarSerDe.testSerDeEmpties
6.org.apache.hadoop.hive.serde2.columnar.TestLazyBinaryColumnarSerDe.testSerDeInnerNulls

The fix is to sort the Field[] f array to maintain the constant order.

hive/serde/src/java/org/apache/hadoop/hive/serde2/objectinspector
/ObjectInspectorUtils.java:560

 Error messages encountered:
-java.lang.AssertionError: expected:<0:lstring> but was:<1:aint>
-java.lang.ClassCastException: class java.lang.Float cannot be cast to class org.apache.hadoop.hive.common.type.Date (java.lang.Float is in module java.base of loader 'bootstrap'; org.apache.hadoop.hive.common.type.Date is in unnamed module of loader 'app')

Can I raise PR for the same ?