Clean the string with commit author and email.
Add branch controller test.
Sanitize branch name and ref name

Conflicts:
	app/controllers/projects/branches_controller.rb
Merge branch '7-4-stable-sanitize' into '7-4-stable'

Sanitize fixes

See merge request !1264
Bump VERSION to 7.4.4
Merge branch '7-4-stable' into 7-4-zh