Bump up manage-lvm role version to v0.2.6

This fixes a bug that caused the role to fail on NVMe only hosts.

Change-Id: I697e83fbc6b1bd044b0e7e42e7c3c6c7468ccfb2

requirements.yml

@@ -14,7 +14,7 @@ roles:
   - src: mrlesmithjr.chrony
     version: v0.1.1
   - src: mrlesmithjr.manage-lvm
-    version: v0.2.2
+    version: v0.2.6
   - src: mrlesmithjr.mdadm
     version: v0.1.1
   - src: singleplatform-eng.users