Add Arbor as an executable recipe

[w-klijn]

To create multi scale simulation with Arbor it should be be executable in the framework.

• Create components needed to execute arbor standalone with MSC

• Document all the steps taken to be used as a howto

• Create test that runs arbor stand aline

[w-klijn]

Work to be one in branch:
https://github.com/multiscale-cosim/ARBOR-NEST-usecase1/tree/arbor_execution