Revert "Performance: skip LVM configuration if no groups configured"

The reverted change relies on the apply parameter for the include_role
playbook, which was introduced in Ansible 2.7. Requirements for the
Train release allow Ansible 2.6, which produces the following error:

    ERROR! Invalid options for include_role: apply

This reverts commit 5fd45d67de.

Change-Id: I33d2b8ea08903d558e2a42231de48edc6567cadf
Story: 2008753
Task: 42114

ansible/lvm.yml

@@ -4,7 +4,7 @@
   tags:
     - lvm
     - upgrade-check
-  tasks:
+  pre_tasks:
     - name: Fail if the LVM physical disks have not been configured
       fail:
         msg: >
@@ -13,7 +13,6 @@
           has a valid 'disks' list.
       with_items: "{{ lvm_groups | default([]) }}"
       when: not item.disks | default([]) or 'changeme' in item.disks | default([])
-
     - name: Fail if the LVM physical disks are configured as a comma-separated string
       fail:
         msg: >
@@ -22,14 +21,10 @@
           each volume group in 'lvm_groups' has a valid 'disks' list.
       with_items: "{{ lvm_groups | default([]) }}"
       when: item.disks | string() == item.disks
-
-    - name: Ensure LVM configuration is applied
-      vars:
-        manage_lvm: True
-      include_role:
-        name: mrlesmithjr.manage-lvm
-        apply:
-          become: True
+  roles:
+    - role: mrlesmithjr.manage-lvm
+      manage_lvm: True
+      become: True
       when:
         - lvm_groups is defined
         - lvm_groups | length > 0