supported dist_node in ct and eunit

[soranoba]

If we try to use the ct_slave in rebar3 ct, net_kernel:start is required each time.
In rebar2 it was not that necessary.
I want that the setting of dist_node is applied to ct and eunit.

[ferd]

You need to add the sname, name and setcookie options into the provider list of accepted arguments in init (see https://github.com/soranoba/rebar3/blob/feature/test-distnode/src/rebar_prv_common_test.erl#L620) otherwise I don't think this will work super well.

[soranoba]

Is this OK?

[ferd]

Yeah that's good, +1 from me. Unless @talentdeficit has any comments on it, I'll merge this sooner than later.

[talentdeficit]

+1 here