fix(freebsd): upgrade to mysql57-server

Current default version for FreeBSD is MySQL 5.7, also python 2.x is
deprecated and should be removed any time soon.

FreeBSD uses the `mysql_install_db` which generates a temporary root
password upon the first start. To the best of my understanding I haven't
seen any code in the formula that handles this method. So I added
a FreeBSD-scpecific block for initialization. While here, create
`/var/log/mysql` without which the server won't start if it doesn't
exist.

Co-authored-by: Geraud CONTINSOUZAS <geraud.continsouzas@skazy.nc>

mysql/osfamilymap.yaml

@@ -206,14 +206,14 @@ Gentoo:
         interactive_timeout: noarg_present
 
 FreeBSD:
-  serverpkg: mysql56-server
-  clientpkg: mysql56-client
+  serverpkg: mysql57-server
+  clientpkg: mysql57-client
   service: mysql-server
-  pythonpkg: py27-pymysql
-  devpkg: mysql56-server
+  pythonpkg: py37-pymysql
+  devpkg: mysql57-server
 
   config:
-    file: /usr/local/etc/my.cnf
+    file: /usr/local/etc/mysql/my.cnf
     sections:
       client:
         socket: /tmp/mysql.sock
@@ -221,7 +221,7 @@ FreeBSD:
         # Empty values below to be resolved, disabling the rule in the meantime
         # yamllint disable rule:empty-values
         user:
-        datadir:
+        datadir: /var/db/mysql
         # yamllint enable rule:empty-values
         socket: /tmp/mysql.sock
         skip-external-locking: noarg_present

mysql/server.sls

@@ -143,13 +143,29 @@ mysql_initialize:
       - pkg: {{ mysql.serverpkg }}
 {%- endif %}
 
+{%- if os_family in ['FreeBSD'] and mysql.serverpkg.lower() != 'mariadb-server' %}
+mysql_initialize:
+ file.directory:
+   - name: /var/log/mysql
+   - user: mysql
+   - group: mysql
+   - mode: '0750'
+  cmd.run:
+    - name: /usr/local/libexec/mysqld --initialize-insecure --user=mysql --basedir=/usr/local --datadir={{ mysql_datadir }}
+    - runas: root
+    - creates: {{ mysql_datadir }}/mysql/
+    - require:
+      - pkg: {{ mysql.serverpkg }}
+      - file: /var/log/mysql
+{%- endif %}
+
 mysqld-service-running:
   service.running:
     - name: {{ mysql.service }}
     - enable: True
     - require:
       - pkg: {{ mysql.serverpkg }}
-{%- if (os_family in ['RedHat', 'Suse'] and mysql.version is defined and mysql.version >= 5.7 and mysql.serverpkg.lower() != 'mariadb-server') or (os_family in ['Gentoo']) %}
+{%- if (os_family in ['RedHat', 'Suse'] and mysql.version is defined and mysql.version >= 5.7 and mysql.serverpkg.lower() != 'mariadb-server') or (os_family in ['Gentoo', 'FreeBSD']) %}
       - cmd: mysql_initialize
 {%- elif os_family in ['RedHat', 'Suse'] and mysql.serverpkg.lower() == 'mariadb-server' %}
       - file: {{ mysql_datadir }}