Enable --verbose on featureUtility when VERBOSE arg is set to true

[leochr]

featureUtility supports the --verbose option. Enable this when VERBOSE flag is set.

This can be useful to get additional information about featureUtility related failures.

Evaluate whether the --verbose option would output too much information. If so, we should consider a separate flag (i.e. FEATURES_VERBOSE)

• Deliver to WebSphere Liberty ci.docker (features.sh use verbose for featureUtility when VERBOSE=true is set WASdev/ci.docker#599)