v0.12.0-rc2

Updated go.mod to use github as the part of the module name

(cherry picked from commit 208d27dd76e81e17650dc4732cbd305c7d2a4dfa)

# Conflicts:
#	vendor/github.com/quintilesims/layer0/api/logic/job_logic.go
#	vendor/github.com/quintilesims/layer0/common/config/config.go
#	vendor/github.com/quintilesims/layer0/common/db/tag_store/dynamo.go
#	vendor/github.com/quintilesims/layer0/common/models/job.go