Fix a bug where by not filling in the user.name field in git commits we were producing immutable git repositories.
Fix a bug where by not filling in the user.name field in
git commits we were producing immutable git repositories.

bk: 56ecd0792OjCD-mrdOnaSaoOEtIsSA
bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper,bitkeeper-scm/bitkeeper