[new_pmlib] add verilog testing to regs_test, cleanup
[new_pmlib] add verilog testing to regs_test, cleanup

jck/pymtl,tj93/pymtl,jjffryan/pymtl,jck/pymtl,Glyfina-Fernando/pymtl,cfelton/pymtl,cornell-brg/pymtl,12yujim/pymtl,jjffryan/pymtl,jck/pymtl,cornell-brg/pymtl,12yujim/pymtl,tj93/pymtl,cfelton/pymtl,jjffryan/pymtl,cfelton/pymtl,tj93/pymtl,Glyfina-Fernando/pymtl,cornell-brg/pymtl,Glyfina-Fernando/pymtl,12yujim/pymtl