Feature/cerati factorize nu graph

[cerati]

Followup PR to #48 . As discussed there, this PR factorizes the code so that most of the tasks are delegated to tools that can be reused across producers. This also will allow experiment-specific or network-version-specific customizations.
Keeping @mhlswang and @vhewes in the loop.

[FNALbuild]

A new Pull Request was created by @cerati for develop.

It involves the following packages:

larrecodnn

@LArSoft/level-1-managers, @LArSoft/level-2-managers can you please review it and eventually sign? Thanks.

cms-bot commands are listed here

[FNALbuild]

The code-checks are being triggered in jenkins.

[FNALbuild]

+code-checks

[knoepfel]

Thanks, @cerati, for this PR--some nice cleanups here. I've added some comments/suggestions for your consideration. Let me know if you'd like to discuss anything further.

[FNALbuild]

Pull request #49 was updated. @LArSoft/level-1-managers, @LArSoft/level-2-managers can you please check and sign again.

[FNALbuild]

The code-checks are being triggered in jenkins.

[FNALbuild]

+code-checks

[cerati]

@knoepfel many thanks for the suggestions. I think I implemented them all in the commit above

[knoepfel]

Thanks, @cerati. Will approve once the CI comes back successful.

[knoepfel]

trigger build

[FNALbuild]

The tests are being triggered in jenkins.

[FNALbuild]

+LArSoft tests OK on slf7 for c14:prof
for details see
https://lar-ci-history.fnal.gov/LarCI/app/ns:LArSoft/view_builds/index?offset=0&builds=lar_ci/24388&builds=
for details of the parent CI build see
https://lar-ci-history.fnal.gov/LarCI/app/view_builds/index?offset=0&builds=&builds=

[FNALbuild]

+LArSoft tests OK on slf7 for e26:prof
for details see
https://lar-ci-history.fnal.gov/LarCI/app/ns:LArSoft/view_builds/index?offset=0&builds=lar_ci/24387&builds=
for details of the parent CI build see
https://lar-ci-history.fnal.gov/LarCI/app/view_builds/index?offset=0&builds=&builds=

[FNALbuild]

-uBooNE tests failed on slf7 for e26:prof
for details see
https://lar-ci-history.fnal.gov/LarCI/app/ns:uBooNE/view_builds/index?offset=0&builds=uboone_ci/11531&builds=
for details of the parent CI build see
https://lar-ci-history.fnal.gov/LarCI/app/view_builds/index?offset=0&builds=lar_ci/24387&builds=

[FNALbuild]

-SBND tests failed on slf7 for e26:prof
for details see
https://lar-ci-history.fnal.gov/LarCI/app/ns:SBND/view_builds/index?offset=0&builds=sbnd_ci/15548&builds=
for details of the parent CI build see
https://lar-ci-history.fnal.gov/LarCI/app/view_builds/index?offset=0&builds=lar_ci/24387&builds=

[FNALbuild]

-ICARUS tests failed on slf7 for e26:prof
for details see
https://lar-ci-history.fnal.gov/LarCI/app/ns:ICARUS/view_builds/index?offset=0&builds=icarus_ci/11080&builds=
for details of the parent CI build see
https://lar-ci-history.fnal.gov/LarCI/app/view_builds/index?offset=0&builds=lar_ci/24387&builds=

[FNALbuild]

-DUNE tests warning on slf7 for e26:prof
for details see
https://lar-ci-history.fnal.gov/LarCI/app/ns:DUNE/view_builds/index?offset=0&builds=dune_ci/18407&builds=
for details of the parent CI build see
https://lar-ci-history.fnal.gov/LarCI/app/view_builds/index?offset=0&builds=lar_ci/24387&builds=

[lgarren]

approve

[FNALbuild]

This pull request is fully signed and it will be merged to develop and built in the next LArSoft release after it passes the integration tests.