Use same test group path and name

Set the path or name of a group, but not both, use the same value
for both. This avoids problems where we specify the name but
search for the path. They used to have the same value (path) and
the name wasn't actually passed to GitLab.

qa/qa/resource/group.rb

@@ -10,7 +10,11 @@ module QA
       end
 
       attribute :name do
-        @name || path
+        @name || @path || Runtime::Namespace.name
+      end
+
+      attribute :path do
+        @path || @name || Runtime::Namespace.name
       end
 
       attribute :sandbox do
@@ -20,7 +24,6 @@ module QA
       end
 
       def initialize
-        @path = Runtime::Namespace.name
         @description = "QA test run at #{Runtime::Namespace.time}"
         @require_two_factor_authentication = false
       end
@@ -64,7 +67,7 @@ module QA
         {
           parent_id: sandbox.id,
           path: path,
-          name: name || path,
+          name: name,
           visibility: 'public',
           require_two_factor_authentication: @require_two_factor_authentication,
           avatar: avatar

qa/qa/specs/features/browser_ui/2_plan/milestone/assign_milestone_spec.rb

@@ -10,13 +10,13 @@ module QA
 
       let(:group) do
         Resource::Group.fabricate_via_api! do |group|
-          group.name = 'group-to-test-milestones'
+          group.name = "group-to-test-milestones-#{SecureRandom.hex(4)}"
         end
       end
 
       let(:project) do
         Resource::Project.fabricate_via_api! do |project|
-          project.name = 'project-to-test-milestones'
+          project.name = "project-to-test-milestones-#{SecureRandom.hex(4)}"
           project.group = group
         end
       end