BAT test for story: user can restore director db from a backup.

[#107648464](https://www.pivotaltracker.com/story/show/107648464)

spec/system/with_release_stemcell_deployment_spec.rb

@@ -83,4 +83,19 @@
       end
     end
   end
+
+  describe 'restore' do
+    it 'should restore director DB' do
+      with_tmpdir do
+        expect(bosh_safe('backup one_deployment.tgz')).to succeed_with /Backup of BOSH director was put in.*one_deployment\.tgz/
+        expect(bosh_safe("delete deployment #{deployment_name}")).to succeed_with /Deleted deployment/
+        expect(bosh_safe('backup no_deployment.tgz')).to succeed_with /Backup of BOSH director was put in.*no_deployment\.tgz/
+        expect(bosh_safe('restore one_deployment.tgz')).to succeed_with /Restore done!/
+        expect(bosh_safe('deployments')).to succeed_with /#{deployment_name}/
+        expect(bosh_safe('restore no_deployment.tgz')).to succeed_with /Restore done!/
+        result = bosh_safe('deployments')
+        expect(result.output).to match_regex(/No deployments/)
+      end
+    end
+  end
 end