WINDUP-1758 WINDUP-1768 CLI option in list* commands

[mrizzi]

The first commit has only the changes for ListTagsCommand.
If these changes are good, then i'll apply the same to ListSourceTechnologiesCommand and ListTargetTechnologiesCommand.

With these changes:

• executing CLI only with --listTags option still executes directly w/o any delay
• executing CLI with --listTags and --userRulesDirectory /path/ options takes 5 seconds because it needs a RuleProviderRegistryCache from Furnace to get all the available tags from all the rules available

[jsight]

This seems like a good approach to me.

[mrizzi]

bcf7584 commit:

• refactored List<Path> getUserProvidedPaths(List<String> arguments) method in AbstractListCommand to check also the ~/.rhamt/rules path for rules
• changes applied also to ListSourceTechnologiesCommand and ListTargetTechnologiesCommand

[jsight]

retest

[jsight]

lgtm