cloud deploy util fails if minion has none unicode strings

Description of Issue/Question

salt/util/cloud.py line 1170

            status = root_cmd('date', tty=False, sudo=False, **kwargs)

fails if the minion has localized locale settings like "de_DE.ISO-8859-1"

Setup

Steps to Reproduce Issue

system is pre bootstrapped with system locale LANG to "de_DE.ISO-8859-1"

[DEBUG   ] Using password authentication
[DEBUG   ] Attempting to authenticate as root (try 15 of 15)
[DEBUG   ] SSH command: 'ssh -oStrictHostKeyChecking=no -oUserKnownHostsFile=/dev/null -oControlPath=none -oConnectTimeout=15  -p 22 root@192.???.???.??? date'
[DEBUG   ] Child Forked! PID: 15966  STDOUT_FD: 14  STDERR_FD: 17
[DEBUG   ] Terminal Command: /bin/sh -c ssh -oStrictHostKeyChecking=no -oUserKnownHostsFile=/dev/null -oControlPath=none -oConnectTimeout=15  -p 22 root@192.???.???.??? date
Warning: Permanently added '???.???.???.???' (RSA) to the list of known hosts.
[DEBUG   ] Warning: Permanently added '192.???.??.???' (RSA) to the list of known hosts.
root@???.???.??.???'s password: [DEBUG   ] root@192.???.??.???'s password:
[ERROR   ] Failed to start Salt on host salt-minion
[INFO    ] Created Cloud VM 'salt-minion'

[root@salt-minion~]# echo $LANG
de_DE.ISO-8859-1
[root@salt-minion ~]# date
Mo 11. M�r 17:14:52 CET 2019
[root@salt-minon ~]#

with patched line 1170

            status = root_cmd('LANG=en_US.UTF-8 date', tty=False, sudo=False, **kwargs)

deployment works as expected

Versions Report

Salt Version:
           Salt: 2019.2.0
 
Dependency Versions:
           cffi: Not Installed
       cherrypy: Not Installed
       dateutil: 2.5.3
      docker-py: Not Installed
          gitdb: 2.0.0
      gitpython: 2.1.1
          ioflo: Not Installed
         Jinja2: 2.9.4
        libgit2: Not Installed
        libnacl: Not Installed
       M2Crypto: Not Installed
           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: 2.7.13 (default, Sep 26 2018, 18:42:22)
   python-gnupg: Not Installed
         PyYAML: 3.12
          PyZMQ: 16.0.2
           RAET: Not Installed
          smmap: 2.0.1
        timelib: Not Installed
        Tornado: 4.4.3
            ZMQ: 4.2.1
 
System Versions:
           dist: debian 9.8 
         locale: UTF-8
        machine: x86_64
        release: 4.9.0-8-amd64
         system: Linux
        version: debian 9.8 

Start in salt/util/cloud.py at line 1170 and reproduce cloud deployment with the minion locale set to de_DE.ISO-8859-1. Check the command's handling of the localized date output and verify that deployment completes successfully under that locale.