[repository-util] Command line not getting style for repository validator class

[donmendelson]

The build specifies the main class to run in repository-validator module. It should be updated since the validator was split into a basic one that only checks schema conformance and another that also checks FIX name styles.

[donmendelson]

RepositoryValidator is supposed to call either BasicRepositoryValidator or FixRepositoryValidator depending on a parameter but it doesn't correctly get that parameter from the command line. The style parameter is implemented in RepositoryValidator.Builder.