DERBY-6704 Hang in AutoloadTest.spawnProcess:JDBCDriversEmbeddedTest on Mac/jdk7,8

Revert accidental commenting out of lines in previous patch for this issue.


git-svn-id: https://svn.apache.org/repos/asf/db/derby/code/branches/10.11@1618619 13f79535-47bb-0310-9956-ffa450edef68