Set project path & name in one field without transforamtion

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Set group path during creation

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Set group name from path in admin controller

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Allow Group path to be changed at the same time as name

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Fix spinach test

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
For API compatibility still generate path from name if only name provided

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Fix test

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>
Merge branch 'project-path' into 'master'

Project path

Fixes gitlab/gitlabhq#1781, gitlab/gitlabhq#1763

See merge request !1337