Feature/filestorage securityservices delete (#133)

* sfs: Add support for security services Delete

* sfs: Add acceptance tests for security service Delete
diff --git a/openstack/sharedfilesystems/v2/securityservices/testing/requests_test.go b/openstack/sharedfilesystems/v2/securityservices/testing/requests_test.go
index 2b3325e..8ef88ee 100644
--- a/openstack/sharedfilesystems/v2/securityservices/testing/requests_test.go
+++ b/openstack/sharedfilesystems/v2/securityservices/testing/requests_test.go
@@ -51,3 +51,14 @@
 		t.Fatal("ErrMissingInput was expected to occur")
 	}
 }
+
+// Verifies that security service deletion works
+func TestDelete(t *testing.T) {
+	th.SetupHTTP()
+	defer th.TeardownHTTP()
+
+	MockDeleteResponse(t)
+
+	res := securityservices.Delete(client.ServiceClient(), "securityServiceID")
+	th.AssertNoErr(t, res.Err)
+}