When the configuration was loaded, the dependencies were resolved at the
time the objects were constructed. To remove the need to check whether a
dependency exists at object creation time, the dependencies can be
resolved by the core as a part of the configuration processing.
The circular dependency resolution uses a template function to solve the
problem in a generic fashion. This might be slightly overkill but it is a
good way to test the waters and see whether the functon would be usable in
as a utility function.
Only explicit object dependencies are resolved. If a module declares a
parameter as a string but uses it like an object name, the dependency is
not resolved and can fail.
As the dependency resolution uses Tarjan's algorithm, it has a side-effect
of creating the correct order of objects to meet their dependencies.
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