Send SMS API

 * Removes SurfnetStepupGatewayBundle and moves resources to application level
 * Creates SurfnetStepupGatewayApiBundle
kinda pointless test, you test whether the object you receive from the call is the same as the object you configured to be returned from the call (lines 35-37). Don't think the service at this point warrants a test. It should be tested (behat?) later on when we also have to make sure we track counts for billing/stats etc.