Remove dynamic check for "build in China"
Remove dynamic check for "build in China"

This commit removes the dynamic check to see if the build is done from China. We shouldn't introduce
adhoc tests for this. It has been replaced with a property that can be set in the `gradle.properties`
local file for users affected by the problem.

The check introduced a *1 minute* slow down for each build, which is unacceptable.

armsargis/groovy,russel/groovy,traneHead/groovy-core,shils/groovy,shils/incubator-groovy,traneHead/groovy-core,armsargis/groovy,avafanasiev/groovy,paulk-asert/groovy,apache/incubator-groovy,russel/incubator-groovy,shils/incubator-groovy,paulk-asert/groovy,apache/groovy,paulk-asert/incubator-groovy,paulk-asert/groovy,avafanasiev/groovy,apache/groovy,jwagenleitner/groovy,jwagenleitner/groovy,paulk-asert/incubator-groovy,apache/incubator-groovy,jwagenleitner/groovy,paulk-asert/groovy,shils/groovy,shils/incubator-groovy,traneHead/groovy-core,russel/incubator-groovy,russel/groovy,paulk-asert/incubator-groovy,traneHead/groovy-core,avafanasiev/groovy,russel/groovy,apache/incubator-groovy,apache/groovy,apache/groovy,armsargis/groovy,jwagenleitner/incubator-groovy,jwagenleitner/incubator-groovy,jwagenleitner/incubator-groovy,russel/incubator-groovy,shils/incubator-groovy,russel/incubator-groovy,jwagenleitner/groovy,armsargis/groovy,shils/groovy,avafanasiev/groovy,jwagenleitner/incubator-groovy,apache/incubator-groovy,russel/groovy,paulk-asert/incubator-groovy,paulk-asert/incubator-groovy,shils/groovy