Rework @LocalDeploy and NXRuntimeTestCase#deployTestContrib

It seems that NXRuntimeTestCase#deployContrib and NXRuntimeTestCase#deployTestContrib do the same thing. You can deploy test contribution with deployContrib, the only requirement is to have a test bundle (which is mainly our case).

As a consequence, @Deploy and @LocalDeploy which rely on these, could also benefit from this rework.

We want to deprecate/remove deployTestContrib and @LocalDeploy if they're not needed anymore. This will reduce complexity of runtime and miscomprehension when you write unit test.