Add base role and playbook, molecule configuration

roles/keycloak/tasks/fastpackages/check.yml

@@ -0,0 +1,14 @@
+---
+- block:
+  - name: "Check if package {{ package_name }} is already installed"
+    command: rpm -q {{ package_name }}
+    args:
+      warn: no
+    register: rpm_info
+    changed_when: rpm_info.failed
+
+  rescue:
+    - name: "If package {{ package_name }} is missing, add it to the yum install list."
+      set_fact:
+        packages_to_install: "{{ packages_to_install + [ package_name ] }}"
+      when: rpm_info.failed

roles/keycloak/tasks/fastpackages/install.yml

@@ -0,0 +1,17 @@
+---
+- set_fact:
+    update_cache: true
+    packages_to_install: []
+
+- name: "Check packages to be installed"
+  include_tasks: check.yml
+  loop: "{{ packages_list | flatten }}"
+  loop_control:
+    loop_var: package_name
+
+- name: "Install packages: {{ packages_to_install }}"
+  become: yes
+  yum:
+    name: "{{ packages_to_install }}"
+    state: present
+  when: packages_to_install | length > 0