MySQL Service Won't Start After Upgrading from MySQL 5.6 to MariaDB 10 On Centos 6

Dana Williams asked:

I could use some help figuring out why upgrading from MySQL 5.6 to MariaDB 10 On Centos 6 is proving so difficult.

Below are the steps I am using followed by the error

cat /etc/centos-release
CentOS release 6.8 (Final)

mysql -V
mysql  Ver 14.14 Distrib 5.6.35, for Linux (x86_64) using  EditLine wrapper

yum -y update

mysqldump --all-databases -p  > /tmp/backupdatabase.sql 

cp /etc/my.cnf /tmp/my.cnf.bak

service mysqld stop

chkconfig mysqld off

yum remove mysql* mysql-server mysql-devel mysql-libs

edit /etc/yum.repos.d/mariadb.repo to point to MariaDB 10 source

yum clean all

yum install MariaDB-server galera MariaDB-client MariaDB-shared MariaDB-backup MariaDB-common

Everything looks fine until this point then:

service mysql start

service mysql start
Starting MariaDB.190801 13:39:12 mysqld_safe Logging to '/var/lib/mysql/designtv.designtv.net.err'.
190801 13:39:12 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql
...../etc/init.d/mysql: line 260: kill: (3056) - No such process

Error Log

190801 14:00:25 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql
190801 14:00:25 [ERROR] Can't read from messagefile '/usr/share/mysql/english/errmsg.sys'
/usr/libexec/mysqld: Unknown error 1146
190801 14:00:25 [ERROR] Can't open the mysql.plugin table. Please run mysql_upgrade to create it.
190801 14:00:25  InnoDB: Initializing buffer pool, size = 8.0M
190801 14:00:25  InnoDB: Completed initialization of buffer pool
190801 14:00:25  InnoDB: Started; log sequence number 0 44233
190801 14:00:25 [ERROR] Aborting

190801 14:00:25  InnoDB: Starting shutdown...
190801 14:00:30  InnoDB: Shutdown completed; log sequence number 0 44233
190801 14:00:30 [Note]
190801 14:00:30 mysqld_safe mysqld from pid file /var/lib/mysql/designtv.designtv.net.pid ended

“/var/lib/mysql/designtv.designtv.net.err” is world readable

ls -la /usr/share/mysql/english/errmsg.sys
-rw-r--r-- 1 root root 61764 Jan 29  2019 /usr/share/mysql/english/errmsg.sys

“[ERROR] Can’t open the mysql.plugin table. Please run mysql_upgrade to create it.”

I can’t run mysql_ugrade until the server is running.