Add kernel package install

Add the ability to install additional kernel related packages.

Change-Id: Ie2ec4b81a0c561c9d6f2a9776a2cd6a711c28d83
Related-Bug: #1840180

tripleo_ansible/roles/tripleo-kernel/defaults/main.yml

@@ -17,4 +17,5 @@
 
 # All variables intended for modification should place placed in this file.
 tripleo_kernel_extra_modules: {}
+tripleo_kernel_extra_packages: {}
 tripleo_kernel_sysctl_extra_settings: {}

tripleo_ansible/roles/tripleo-kernel/molecule/extra/playbook.yml

@@ -20,7 +20,9 @@
   roles:
     - role: "tripleo-kernel"
       tripleo_kernel_extra_modules:
-        - dummy: {}
+        dummy: {}
+      tripleo_kernel_extra_packages:
+        'kmod-kvdo': {}
       tripleo_kernel_sysctl_extra_settings:
         kernel.ftrace_dump_on_oops:
           value: 1

tripleo_ansible/roles/tripleo-kernel/tasks/main.yml

@@ -39,6 +39,12 @@
       notify:
         - Sysctl reload
 
+    - name: Install additional packages
+      package:
+        name: "{{ item.key }}"
+        state: "{{ item.opt.state | default('present') }}"
+      loop: "{{ tripleo_kernel_extra_packages | dict2items(key_name='key', value_name='opt') }}"
+
     - name: Write list of modules to load at boot
       template:
         src: "tripleo-modprobe.conf.j2"