Dynamic worker name

The worker name used currently is 'local' and is hard-wired in several modules.

With the new resource configuration (resconfig) it is possible to dynamically select the worker matching the resorces. In fact, this configuration is already used for constructing the qadapter.

This feature will not change any behavior if the reconfig includes only one worker, as it is in the most use cases. But it will enable using several clusters to run different parts of a model.