Add another testbench for different parities

[EvilLord666]

quick_rs232_tb should be renamed to quick_rs232_nofc_evenparity_tb (and same module name) we should add following testbenches:

• check no parity case quick_rs232_nofc_noparity_tb (rs232 rx && tx must be shorter than in other cases)
• check space parity case quick_rs232_nofc_spaceparity_tb
• check mark parity case quick_rs232_nofc_markparity_tb
• check odd parity case quick_rs232_nofc_oddparity_tb