JAVA-2558: Upgrade to groovy-all:2.4.12 and spock-core:1.1-groovy-2.4
JAVA-2558: Upgrade to groovy-all:2.4.12 and spock-core:1.1-groovy-2.4

rozza/mongo-java-driver,jyemin/mongo-java-driver,jyemin/mongo-java-driver,rozza/mongo-java-driver