Cache artifacts for the duration of the build...

Helps if we don't run a load of parallel job which each have to
hit maven to make sure the 3 second old build is still current.

build.gradle

@@ -125,8 +125,8 @@ subprojects {
 
 allprojects {
     configurations.all {
-        resolutionStrategy.cacheDynamicVersionsFor 0, 'seconds'
-        resolutionStrategy.cacheChangingModulesFor 0, 'seconds'
+        resolutionStrategy.cacheDynamicVersionsFor 2, 'minutes'
+        resolutionStrategy.cacheChangingModulesFor 2, 'minutes'
     }
 }