Build UAA and Login Server from source code. This happens during the pre_package phase since it is a Java job and requires internet to download maven dependencies. UAA and Login Server has been added as sub modules.

add an actual OpenJDK that contains javac. Version 1.7. Add our compiled JRE 1.7 for runtime
Compile time JDK comes from https://github.com/alexkasko/openjdk-unofficial-builds#openjdk-unofficial-installers-for-windows-linux-and-mac-os-x