adding missing test for case where user has zero client_slug

spec/features/client_slug_authz_spec.rb

@@ -0,0 +1,8 @@
+describe "client_slug confers authz rules" do
+  it "rejects requests for user with no client_slug" do
+    user = FactoryGirl.create(:user)
+    login_as(user)
+    visit '/ncr/work_orders/new'
+    expect(page.status_code).to eq(403)
+  end
+end