Update commons-logging to 1.1.3 and set scope to test for hamcrest lib in pom

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1563997 13f79535-47bb-0310-9956-ffa450edef68
Adjust Eclipse classpath for new versions of third party libraries

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1563998 13f79535-47bb-0310-9956-ffa450edef68
Switch to JDK 6 for generated code as well

git-svn-id: https://svn.apache.org/repos/asf/poi/trunk@1563999 13f79535-47bb-0310-9956-ffa450edef68