TT-362: modified build.gradle to add a fatjar task to create an executable jar
TT-362: modified build.gradle to add a fatjar task to create an executable jar

Authors: 897755748f334901744cf1b9b6f8a519d1db17fb@minhngocd

kornysietsma/ci-spike-sample-app,kornysietsma/ci-spike-sample-app