RedHat: Remove packages with conflict with MariaDB

Fixes the following problem since the upgrade to MariaDB 10.2

 file /usr/lib64/mysql/plugin/mysql_clear_password.so from install of MariaDB-common-10.2.17-1.el7.centos.x86_64 conflicts with file from package mariadb-common-3:10.1.20-2.el7.x86_64

Change-Id: I686ff5d70548f15a60f623e30b0b37fb0d525b8b

tasks/galera_client_install.yml

@@ -21,6 +21,23 @@
     - install-yum
     - install-zypper
 
+- name: Remove conflicting packages
+  package:
+    name: "{{ galera_client_distro_remove_packages | default([]) }}"
+    state: "absent"
+    update_cache: "{{ (ansible_pkg_mgr in ['apt', 'zypper']) | ternary('yes', omit) }}"
+    cache_valid_time: "{{ (ansible_pkg_mgr == 'apt') | ternary(cache_timeout, omit) }}"
+  register: install_packages
+  until: install_packages is success
+  retries: 5
+  delay: 2
+  when:
+    - galera_client_package_install | bool
+  tags:
+    - galera-client-apt-packages
+    - galera-client-yum-packages
+    - galera-client-zypper-packages
+
 - name: Install galera distro packages
   package:
     name: "{{ galera_client_distro_packages }}"

vars/redhat-7.yml

@@ -22,6 +22,10 @@ _galera_client_repo:
   baseurl: "{{ galera_client_repo_url }}"
   gpgkey: "http://yum.mariadb.org/RPM-GPG-KEY-MariaDB"
 
+# Packages conflicting with MariaDB
+galera_client_distro_remove_packages:
+  - mariadb-common-3
+
 # MariaDB-devel is required for mysql_config, which is subsequently required for pip install of MySQL-python
 galera_client_distro_packages:
   - MariaDB-client