* Allow Git ref for /repos/{owner}/{repo}/git/commits/{sha}

* Consolidate API for getting single commit

* Fix tests and do it differently

Co-authored-by: zeripath <art27@cantab.net>

* GET /repos/:owner/:repo/commits/:ref

* add Validation Checks

* Fix & Extend TEST

* add two new tast cases

* Fix data race in testlogger

* Update git_helper_for_declarative_test.go

* Added API endpoint ListAllCommits (/repos/{owner}/{repo}/git/commits)

Signed-off-by: Mike Schwörer <mailport@mikescher.de>

* Fixed failing drone build

Signed-off-by: Mike Schwörer <mailport@mikescher.de>

* Implemented requested changes (PR reviews)

Signed-off-by: Mike Schwörer <mailport@mikescher.de>

* gofmt

Signed-off-by: Mike Schwörer <mailport@mikescher.de>

* Changed api route from "/repos/{owner}/{repo}/git/commits" to "/repos/{owner}/{repo}/commits"

* Removed unnecessary line

* better error message when git repo is empty

* make generate-swagger

* fixed removed return

* Update routers/api/v1/repo/commits.go

Co-Authored-By: Lauris BH <lauris@nix.lv>

* Update routers/api/v1/repo/commits.go

Co-Authored-By: Lauris BH <lauris@nix.lv>

* go fmt

* Refactored common code into ToCommit()

* made toCommit not exported

* added check for userCache == nil

* add single commit API support

* Inital routes to git refs api

* Git refs API implementation

* Update swagger

* Fix copyright

* Make swagger happy add basic test

* Fix test

* Fix test again :)