This is a refactoring task that can be done after new parser is implemented.

Applicable to two creation results:
MissingMandatoryParam, InvalidParamValues.

Both of these cases are caused by invalid parameters passed to TemplateCreator on template creation.
The error message returned by TemplateCreator in those cases is poor:

• for MissingMandatoryParam it is a comma-separated list of missing parameters
• similar to InvalidParamValues

Due to this, TemplateInvoker in CLI has weird logic of parsing those messages, as it needs to show errors about options, and not parameter names.

Consider improving ITemplateCreationResult for these statuses. As example, it may contain dictionary with parameters and localized error message, then TemplateInvoker can use it to show error message vs template options.