Document `gitlab` service account creation. Re-word to make documentation flow in both cluster addtion and creation scenarios
Document `gitlab` service account creation. Re-word to make documentation flow in both cluster addtion and creation scenarios

Add table of resources created for ease of scannning

dreampet/gitlab,iiet/iiet-git,dreampet/gitlab,mmkassem/gitlabhq,mmkassem/gitlabhq,dreampet/gitlab,stoplightio/gitlabhq,mmkassem/gitlabhq,mmkassem/gitlabhq,axilleas/gitlabhq,iiet/iiet-git,iiet/iiet-git,stoplightio/gitlabhq,axilleas/gitlabhq,stoplightio/gitlabhq,stoplightio/gitlabhq,iiet/iiet-git,axilleas/gitlabhq,dreampet/gitlab,axilleas/gitlabhq