[tests] add new tests.

tests/CO2Benchmark/MCrefs_MeanStd.csv

tests/CO2Benchmark/MeasuredPressure.csv

tests/CO2Benchmark/Test_CO2Benchmark.py

tests/CO2Benchmark/grids/leakingwellcoarse.dgf

tests/CO2Benchmark/interface.tpl.xml

tests/CO2Benchmark/interface.xml

tests/CO2Benchmark/model_CO2.py

tests/CO2Benchmark/read_CO2.py

tests/CO2Benchmark/refData/InputParameters.csv

tests/CO2Benchmark/refData/MCrefs_MeanStd.csv

tests/CO2Benchmark/refData/Prior.npy

tests/CO2Benchmark/refData/log_Ref.out

tests/CO2Benchmark/refData/origModelOutput.npy

tests/CO2Benchmark/refData/origPosterior.csv

tests/CO2Benchmark/refData/validLikelihoods.npy

tests/CO2Benchmark/test_2p

...chmark/uqbenchmark/ReferenceGenerator/InputParameters.csv

...s/CO2Benchmark/uqbenchmark/ReferenceGenerator/MCMC_CO2.sh

...nchmark/uqbenchmark/ReferenceGenerator/MCrefs_MeanStd.csv

tests/CO2Benchmark/uqbenchmark/ReferenceGenerator/Prior.npy