GENIE updates, including GENIE Reweight

[wesketchum]

I am adding a new package to the container, here are the details.

What new packages does this PR add to the development container?

• pythia8 (v8.3.10)
• GENIE v3.4 (update from v3.2)
• GENIE Reweight

Check List

• I successfully built the container using docker

# outline of container build instructions
cd docker
git checkout my-updates
docker build . -t ldmx/local:temp-tag

• I was able to build ldmx-sw using this new container build

# outline of build instructions
ldmx-container-pull local temp-tag
cd ldmx-sw
mkdir build
cd build
ldmx cmake ..
ldmx make install

• I was able to test run a small simulation and reconstruction inside this container

# outline of test instructions
cd $LDMX_BASE/ldmx-sw/build
ldmx ctest
cd ..
for c in `ls ldmx-sw/*/test/*.py`; ldmx fire $c; done

• I was able to successfully use the new packages. Explain what you did to test them below:
  Run of GenieGenerator simulation.

[wesketchum]

One todo -- use a fork of GENIE Reweight, and properly tag the desired commit (rather than head of master) and pull that down.

[tomeichlersmith]

Besides the specific comments, please add comment in Pythia6 comment block about how it shouldn't be necessary but trying to remove it broke parts (or all?) of GENIE. Just a helpful reminder for future folks who may be updating GENIE to try again.

[tomeichlersmith]

Why does Pythia8 require rsync? Does it download stuff from servers during running?

[tomeichlersmith]

As discussed in the SW Dev meeting, we should change this to be a specific commit sha and if possible a specific human-readable tag made by the GENIE folks. Then (whichever path occurs), we should update ENV and LABEL with the version of GENIE Reweight installed.

something like

ENV GENIE_REWEIGHT_VERSION=1_02_03
LABEL genie_reweight.version=${GENIE_REWEIGHT_VERSION}

[wesketchum]

Closing this in favor of #105.