Add optional --excluderegex argument to ZkCLI.java class.
This change preserves existing behavior (files whose name starts with a . will not be uploaded to ZK) if the new optional argument is not specified. If an --excluderegex argument is specified then files matching the regular expression won’t be uploaded to ZK.
Additionally, ZkConfigManager.uploadToZK now info logs the names of the files that were skipped from uploading to ZK.