a couple of javadoc warnings on trunk

[Kathey Marsden]

          [javadoc] javadoc: warning - No source files for package 
org.apache.derbyTesting.functionTests.testData.serializedDataSources
                  [javadoc] 
C:\nightlies\main\src\opensource\java\testing\org\apache\derbyTesting\functionTests\tests\jdbcapi\DataSourceSerializationTest.java:175:
 warning - Tag @link: reference not found: java.sql.DataSource
                  [javadoc] 2 warnings