NSHM Unit tests

When running NSHM unit tests in pipeline, instead of running the hazard calculation in the junit test itself the hazard calculation is done by running a java class and writing out the results to JSON files.

gradle/nshm.gradle

@@ -82,6 +82,7 @@ task nshms() {
 task testAlaska2007(type: Test) {
   description = "Test Alaska 2007 NSHM"
   group = "verification"
+  println("Memory: " + xmx)
 
   doFirst {
     downloadNshm(findNshm("nshm-alaska", 2007))