[Feature] CNF Installation (3), Switch to new config usage

[kosstennbl]

During steps 1 and 2 of #2120, new config should be prepared for usage and should be back-compatible by using config transformer.

This step is responsible for changing all usages of config in testsuite to the new, v2 format. Most of the code, that was used by v1 config should be removed. All example and sample cnf configs should be changed (using config transformer) to the new format.