GROOVY-5868 - ConfigObject is unexpectedly no longer Cloneable
use "clone.configFile = configFile" instead of "clone.configFile = new URL(configFile.toString());" because the clone of the backing map is shallow anyway
removed unnecessary import
Merge pull request #94 from PascalSchumacher/GROOVY-5868

GROOVY-5868 - ConfigObject is unexpectedly no longer Cloneable
merged