Fix molecule tests for EL7 (#636)

* Fix molecule tests for EL7

Signed-off-by: Sebastian Gumprich <sebastian.gumprich@t-systems.com>

* Apply suggestions from code review

Co-authored-by: schurzi <Martin.Schurz@t-systems.com>

* try to fix tests in centos 7

Signed-off-by: Sebastian Gumprich <sebastian.gumprich@t-systems.com>

* try to fix tests in centos 7

Signed-off-by: Sebastian Gumprich <sebastian.gumprich@t-systems.com>

---------

Signed-off-by: Sebastian Gumprich <sebastian.gumprich@t-systems.com>
Co-authored-by: dev-sec CI <hello@dev-sec.io>
Co-authored-by: schurzi <Martin.Schurz@t-systems.com>

molecule/mysql_hardening/prepare.yml

@@ -60,6 +60,13 @@
         - ansible_distribution != "Ubuntu"
         - ansible_distribution_major_version|int < 20
 
+    - name: Install required MySQL Python libraries on RHEL
+      yum:
+        name: "{% if 'python3' in ansible_python_interpreter|default('') %}python36-PyMySQL{% else %}python2-PyMySQL{% endif %}"
+      when:
+        - ansible_os_family == "RedHat"
+        - ansible_distribution_major_version == "7"
+
     - include_role:
         name: dev-sec.mysql