Bug fix: Allow dolt init to use --data-dir param

[fulghum]

Previously, dolt init would use the value of --data-dir for almost all of the repository initialization, but the code that set up repository configuration would always use the current directory. This change allows callers to use dolt init with the --data-dir param to initialize directories other than the current working directory as Dolt repositories.

[coffeegoddd]

@fulghum DOLT

comparing_percentages
100.000000 to 100.000000

version	result	total
2933f44	ok	5937457

version	total_tests
2933f44	5937457

correctness_percentage
100.0

[jycor]

LGTM