…te cleaning.

…s from MkFitCore/standalone/Makefile; remove obsolete tkNtuple/Makefile (build included in top-level MkFitCMS/standalone/Makefile).

* mkFit.cc: Make use-dead-modules really optional. They are hardcoded
for CMS-2107, some unknown setup.

* MkBuilder.cc: Make some high-volume debug output optional.

* val_scripts/validation-cmssw-benchmarks-multiiter.sh:
- Add new sample TTbar_Phase2.
- Add variable for numiters
- Make --use-dead-modules configurable
- Add var for exstra mkFit args to pass in --geom CMS-2029
- Detect Fedora and use lower n_threads / maxvu. Use AVX2 instead
  of AVX_512. This should be configurable in some other way.

* plotting/Common.hh: Do not try to plot STD in MIMI case - exported
via an env variable for lack of a better idea.
We should support STD in MIMI with upcoming configurability changes.

* validation-desc.txt: Add a prelimiary note describing how I ran
the Phase2 test. Standalone validation has not been tried since the
move into CMSSW so this should be worked on further.

* xeon_scripts/init-env.sh:
Detect Fedora and use el8 binaries in this case.
This should be the default once we drop Centos-7.

…eeds.

…onfigurations.

…ates to clean_duplicates.

* Rename find_duplicates functions to clean_duplicates prefix.

* Remove obsolete iteration-id dependant steering code.

* Update README.md with changes / std function name config dexcriptions.

* Move seed-cleaning and duplicate-cleaning parameters out of IterationParams
  into IterationConfig. Prefix them with sc_ and dc_.

* When getting std function by name, throw an exception if name string is
  non-empty and the function does not exist in the registry.

* Add m_layer member to IterationLayerConfig.

…t used for standard function catalogs -- approved by Matti.

…ze with the phase1 dumper.

…ng the phase2 geometry.