Adding systematics plotting script

[bryates]

This script produces plots of the systematic temples. It plots N templates per image, with N specified by group . Each plot has two types: one showing the change relative to the nominal temple in that channel, and another showing the relative contribution to the total yield in that channel.
Example

python make_syst_plots.py /scratch365/byates2/3l_fwd/ptz-lj0pt_withSys/ -o ~/www/EFT/systs/group5/ --group 5 -C

will use my 3l_fwd cards with 5 per plot and run in parallel on condor.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 166 lines in your changes missing coverage. Please review.

Project coverage is 24.64%. Comparing base (3471b74) to head (4cb58c7).
Report is 3 commits behind head on master.

Files with missing lines	Patch %	Lines
analysis/topeft_run2/make_syst_plots.py	0.00%	166 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #467      +/-   ##
==========================================
- Coverage   25.43%   24.64%   -0.79%     
==========================================
  Files          35       36       +1     
  Lines        5185     5351     +166     
==========================================
  Hits         1319     1319              
- Misses       3866     4032     +166     

Flag	Coverage Δ
unittests	24.64% <0.00%> (-0.79%)	⬇️

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