Updated tests to remove deprecated code from tests

* cleanup removing unused headers
* Updated asserts in code base that needed messages (marked as deprecated)
* left one test that was testing a deprecated constructor.  When that code is removed we can remove that test.
* some other cleanup

resolves #338

spring-cloud-task-samples/jpa-sample/src/test/java/io/spring/JpaApplicationTests.java

@@ -101,7 +101,7 @@ public class JpaApplicationTests {
 		assertTrue("Unable to find the insert message: " + output, output.contains(INSERT_MESSAGE));
 		JdbcTemplate template = new JdbcTemplate(this.dataSource);
 		Map<String, Object> result = template.queryForMap("Select * from TASK_RUN_OUTPUT");
-		assertThat(((Long) result.get("ID")), is(1L));
+		assertThat((result.get("ID")), is(1L));
 		assertThat(((String) result.get("OUTPUT")), containsString("Executed at"));
 	}