Update Hudson jobs because of JDK1.5 finishing EOL transition period

J2SE 5.0 is in its Java Technology End of Life (EOL) transition period. The EOL transition period began April 8th, 2008 and will complete October 30th, 2009, when J2SE 5.0 will have reached its End of Service Life (EOSL).

This means we're going to run QA using JDK 1.6 only:

• remove JDK 5 jobs from hudson
• rename JDK 6 jobs (useless JDK6 postfix)
• build AS and run AS testsuite with JDK 6
• make sure the latest JDK 6 update is being used (currently u15)
• update release notes to make clear which version of the jdk the project is tested with

This btw should give us some time (on hudson machine) to run a few jobs (NOT ALL JOBS, perhaps just one for each container-stack couple) with Open JDK.