Fixes #60: Better detection of whether MySQL was installed.

tasks/secure-installation.yml

@@ -11,7 +11,7 @@
     mysql -u root -NBe
     'SET PASSWORD FOR "{{ mysql_root_username }}"@"{{ item }}" = PASSWORD("{{ mysql_root_password }}");'
   with_items: mysql_root_hosts.stdout_lines
-  when: mysql_service_configuration.changed or mysql_root_password_update
+  when: mysql_install_packages.changed or mysql_root_password_update
 
 # Has to be after the root password assignment, for idempotency.
 - name: Copy .my.cnf file with root password credentials.

tasks/setup-Debian.yml

@@ -13,6 +13,7 @@
 - name: Ensure MySQL packages are installed.
   apt: "name={{ item }} state=installed"
   with_items: mysql_packages
+  register: mysql_install_packages
 
 # Because Ubuntu starts MySQL as part of the install process, we need to stop
 # mysql and remove the logfiles in case the user set a custom log file size.

tasks/setup-RedHat.yml

@@ -5,3 +5,4 @@
 - name: Ensure MySQL packages are installed.
   yum: "name={{ item }} state=installed enablerepo={{ mysql_enablerepo }}"
   with_items: mysql_packages
+  register: mysql_install_packages