DERBY-6704; Hang in AutoloadTest.spawnProcess:JDBCDriversEmbeddedTest on Mac/jdk7,8
   merge of revision 1618859 from trunk to cleanup javadoc warnings.


git-svn-id: https://svn.apache.org/repos/asf/db/derby/code/branches/10.11@1619274 13f79535-47bb-0310-9956-ffa450edef68