ARIA-174 Refactor instantiation phase
The main issue this PR addressed was the consolidation
of instantiation mechanism into a single package - `topology`.
The code itself got additional refactoring:
1. `dump` no longer prints onto the console but rather returns a string representation to be printed.
2. The service related consumers use the new `topology` package.
These additional issues were fixed as part of this PR:
* Req-Cap mechanism is now trying to satisfy requirements for a specific capability type.
* Issue with resuming workflows - accessing a non existing attribute.
39 files changed
