Simplify dependencies for standalone mode

[lordofthejars]

Issue Overview

All the projects I have seen that are using Arquillian Cube, they are using standalone mode. This means that they always have to add two dependencies the core one and the cube (docker|restassured|kubernetes|openshift) ones.

Expected Behaviour

Create a project that contains both dependencies (core-standalone and cube(docker|restassured|kubernetes|openshift)) so from the UX point of view, only one jar is required.

Also, this simplifies the adoption since user don't need to understand anything about the internals of Arquillian (what does it means standalone) or use the wrong approach (they use the container mode but what they really meant is the standalone one).

Current Behaviour

Two dependencies are required.

[lordofthejars]

The way of doing this is by creating a maven module of type jar which will contain as dependencies the required dependencies, for example arquillian-standalone and arquillian-cube-docker.