Revert "Take git repo user name as default package author"

This reverts commit b7ed0018ed7b20384c1d49a4e80f473f514237ea.
Revert "Allow for setting of an initial git config when creating pkg repos, used for testing"

This reverts commit 5ec8bf435f1987d6560564f2a42c1d685e922499.
Configure git on Travis for Pkg.generate() tests
Test Pkg.generate() with default args