Update test classes on Mock usage

Update all test classes which uses Mock objects, to follow below Mock usage

@Mock private StatementContext context;
  @Before
  public void setup() {
    MockitoAnnotations.initMocks(this);
  }

Reference: DatasetRowMapperTest.java

[wslulciuc]

@ravikamaraj: We can even go a step further and remove the setup() using MockitoRule. For example:

 public class ExampleTest {

     //Creating new rule with recommended Strictness setting
     @Rule public MockitoRule rule = MockitoJUnit.rule().strictness(Strictness.STRICT_STUBS);

     @Mock
     private List list;

     @Test
     public void shouldDoSomething() {
         list.add(100);
     }
 }

Initializes mocks annotated with Mock, so that explicit usage of MockitoAnnotations.initMocks(Object) is not necessary. Mocks are initialized before each test method.

[ravikamaraj]

I would pick this task today