x509.certificate_managed throw exception with Python3

[cifvts]

Description of Issue

Using the state function x509.certificate_managed throw and exception when using SaltStack with Python3 support

Setup

/etc/openvpn/server/server1.crt :
    x509.certificate_managed :
        - ca_server         : ca_server
        - signing_policy    : openvpnserver
        - public_key        : /etc/openvpn/server1/server1.key
        - CN                : server1
        - days_remaining    : 90
        - days_valid        : 720
        - backup            : True
        - require           :
            - x509          : /etc/openvpn/server/server1.key
            - pkg           : openvpn

Steps to Reproduce Issue

(Debian 9.9)

• Install salt-minion from Python3 repo
• Install python3-pip
• Install m2crypto using pip3
• Execute the state

----------
          ID: /etc/openvpn/server/server1.crt
    Function: x509.certificate_managed
      Result: False
     Comment: An exception occurred in this state: Traceback (most recent call last):
                File "/usr/lib/python3/dist-packages/salt/state.py", line 1933, in call
                  **cdata['kwargs'])
                File "/usr/lib/python3/dist-packages/salt/loader.py", line 1939, in wrapper
                  return f(*args, **kwargs)
                File "/usr/lib/python3/dist-packages/salt/states/x509.py", line 502, in certificate_managed
                  new = __salt__['x509.create_certificate'](testrun=True, **kwargs)
                File "/usr/lib/python3/dist-packages/salt/modules/x509.py", line 1383, in create_certificate
                  passphrase=kwargs['public_key_passphrase']).replace('\n', '')
              TypeError: a bytes-like object is required, not 'str'
     Started: 17:16:32.801267
    Duration: 9.888 ms
     Changes:   

Versions Report

Master is running Python2 version

Salt Version:
Salt: 2019.2.0

Dependency Versions:
cffi: Not Installed
cherrypy: Not Installed
dateutil: 2.5.3
docker-py: Not Installed
gitdb: Not Installed
gitpython: Not Installed
ioflo: Not Installed
Jinja2: 2.9.4
libgit2: Not Installed
libnacl: Not Installed
M2Crypto: 0.33.0
Mako: Not Installed
msgpack-pure: Not Installed
msgpack-python: 0.4.8
mysql-python: Not Installed
pycparser: Not Installed
pycrypto: 2.6.1
pycryptodome: Not Installed
pygit2: Not Installed
Python: 3.5.3 (default, Sep 27 2018, 17:25:39)
python-gnupg: Not Installed
PyYAML: 3.12
PyZMQ: 16.0.2
RAET: Not Installed
smmap: Not Installed
timelib: Not Installed
Tornado: 4.4.3
ZMQ: 4.2.1

System Versions:
dist: debian 9.9
locale: UTF-8
machine: x86_64
release: 4.9.0-9-amd64
system: Linux
version: debian 9.9

[dmurphy18]

@cifvts Marking this as a duplicate of #53294 , x509.py needs to be revised for Python 3 encode / decode handling, etc. for str / bytes