Ensure ordering for group sorting tests

Instead of manually creating list to compare the test result,
use system sort to assure no errors are introduced.
Signed-off-by: Marko, Peter <peter.marko@siemens.com>

spec/requests/api/groups_spec.rb

@@ -152,7 +152,7 @@ describe API::Groups do
         expect(response).to have_gitlab_http_status(200)
         expect(response).to include_pagination_headers
         expect(json_response).to be_an Array
-        expect(response_groups).to eq([group3.name, group1.name, group4.name])
+        expect(response_groups).to eq(Group.visible_to_user(user1).order(:name).pluck(:name))
       end
 
       it "sorts in descending order when passed" do
@@ -161,7 +161,7 @@ describe API::Groups do
         expect(response).to have_gitlab_http_status(200)
         expect(response).to include_pagination_headers
         expect(json_response).to be_an Array
-        expect(response_groups).to eq([group4.name, group1.name, group3.name])
+        expect(response_groups).to eq(Group.visible_to_user(user1).order(name: :desc).pluck(:name))
       end
 
       it "sorts by path in order_by param" do
@@ -170,7 +170,7 @@ describe API::Groups do
         expect(response).to have_gitlab_http_status(200)
         expect(response).to include_pagination_headers
         expect(json_response).to be_an Array
-        expect(response_groups).to eq([group1.name, group4.name, group3.name])
+        expect(response_groups).to eq(Group.visible_to_user(user1).order(:path).pluck(:name))
       end
 
       it "sorts by id in the order_by param" do
@@ -179,7 +179,7 @@ describe API::Groups do
         expect(response).to have_gitlab_http_status(200)
         expect(response).to include_pagination_headers
         expect(json_response).to be_an Array
-        expect(response_groups).to eq([group1.name, group3.name, group4.name])
+        expect(response_groups).to eq(Group.visible_to_user(user1).order(:id).pluck(:name))
       end
     end