Fix Java 7 support; fix global timeout support

My initial effort at implementing Java 7 support missed the mark. This release uses the tool chain plug-in to ensure that the Java 7 JDK is used for compilation. This changed revealed that I had more Java 8 code and dependencies to replace with Java 7 equivalents. In the process, I discovered that my global timeout implementation probably shouldn't have ever worked, as I was applying the timeout at the wrong level.