Rename configs with the paper naming conventions

scripts/config/MNIST/analysis/config/pcn-s2stdp.json

scripts/config/MNIST/analysis/config/s2stdp.json

scripts/config/MNIST/analysis/config/sstdp.json

scripts/config/MNIST/analysis/lr/pcn-s2stdp.json

scripts/config/MNIST/analysis/lr/s2stdp.json

scripts/config/MNIST/analysis/lr/sstdp.json

scripts/config/MNIST/analysis/t_gap/pcn-s2stdp.json

scripts/config/MNIST/analysis/t_gap/s2stdp.json

scripts/config/MNIST/analysis/t_gap/sstdp.json

scripts/config/MNIST/csnn-128/csnn.json

scripts/config/MNIST/csnn-128/pcn-s2stdp.json

scripts/config/MNIST/csnn-128/rstdp-20n.json

scripts/config/MNIST/csnn-128/rstdp.json

scripts/config/MNIST/csnn-128/s2stdp.json

scripts/config/MNIST/csnn-128/sstdp.json

scripts/config/MNIST/csnn-16/csnn.json

scripts/config/MNIST/csnn-16/pcn-s2stdp.json

scripts/config/MNIST/csnn-16/rstdp-20n.json

scripts/config/MNIST/csnn-16/rstdp.json

scripts/config/MNIST/csnn-16/s2stdp.json