Revert "Small correction. Commit command uses options.username (in spec this is for repo username) as config name --> replacing with options.name as per options spec."

This reverts commit 34cdf2d2766749b3c639fdc258fa690db43fc129.
Correction to commit.dart
Small correction. Commit command uses options.username (in spec this is for repo username) as config name --> replacing with options.name as per options spec.