Refactored and fixed seeds to work with gitlab-shell

db/fixtures/development/01_admin.rb

db/fixtures/development/02_source_code.rb

db/fixtures/development/03_group.rb

db/fixtures/development/04_project.rb

db/fixtures/development/05_users.rb

db/fixtures/development/06_teams.rb

db/fixtures/development/07_milestones.rb

db/fixtures/development/08_wall.rb

db/fixtures/development/09_issues.rb

db/fixtures/development/10_merge_requests.rb

db/fixtures/development/11_keys.rb