Add git to dockerfile for auto-bummper scripts
Add git to dockerfile for auto-bummper scripts

[#180054765] TAS-138 Add Golang autobumping and dependency autobumping to our Go repos

Signed-off-by: Brian Upton <633483f7295e665b4a23d10cfc31c2458b36dfcc@vmware.com>

bosh-packages/golang-release,bosh-packages/golang-release