Partial fix for https://issues.apache.org/bugzilla/show_bug.cgi?id=56079
Switch to the signed versions of Apache Commons Daemon 1.0.15 binaries.

Note: As location of already downloaded files has not changed,
one has to clear the previously downloaded files from ${base.path}/commons-daemon-1.0.15 to get the updated dependency.

git-svn-id: https://svn.apache.org/repos/asf/tomcat/tc6.0.x/trunk@1632897 13f79535-47bb-0310-9956-ffa450edef68