Replace deprecated pyOpenSSL.crypto.load_pkcs12 with cryptography.hazma version

[skiphansen]

Tested with sample codeplug from MOTOTRBO CPS 16.0 Build 823 AZ.

(env) skip@Dell-5510:~/open_src/codeplug$ python codeplug.py decode Sample_XIRM8668i.ctb
Decoded GEMSTONE archive to Sample_XIRM8668i.ctb.xml
(env) skip@Dell-5510:~/open_src/codeplug$ python codeplug.py build -o Sample_XIRM8668i_1.ctb Sample_XIRM8668i.ctb.xml
Built GEMSTONE archive in Sample_XIRM8668i_1.ctb
(env) skip@Dell-5510:~/open_src/codeplug$ python codeplug.py decode Sample_XIRM8668i_1.ctb
Decoded GEMSTONE archive to Sample_XIRM8668i_1.ctb.xml
(env) skip@Dell-5510:~/open_src/codeplug$ md5sum *.xml
ff432e71e9ff982d31cb56e8ecff8339  Sample_XIRM8668i_1.ctb.xml
ff432e71e9ff982d31cb56e8ecff8339  Sample_XIRM8668i.ctb.xml
(env) skip@Dell-5510:~/open_src/codeplug$

I also merged your matrix branch since it seemed to be the most recent.

Thanks for sharing this!
Amazing work.