nightly-container: Enable lvmetad within container

LVM config is modified to enable lvmetad but disable udev. The lvm2
tmpfiles config is also removed to prevent /run/lvm bind-mounts from
being overwritten.

This requires that lvmetad is enabled on the host, and the
lvmetad.socket from the host is bind-mounted within the container at
/run/lvm/lvmetad.socket .

extras/nightly-container/provision.yml

@@ -54,7 +54,6 @@
       with_items:
         - {option: "udev_rules", oldval: "1", newval: "0"}
         - {option: "udev_sync", oldval: "1", newval: "0"}
-        - {option: "use_lvmetad", oldval: "1", newval: "0"}
 
     # Using shell here instead of find/file modules as this is much easier
     - name: Cleanup systemd targets
@@ -70,6 +69,11 @@
       args:
         warn: no
 
+    - name: Remove lvm2 tmpfiles config
+      file:
+        path: /usr/lib/tmpfiles.d/lvm2.conf
+        state: absent
+
     - name: Update udev systemd rules
       command: sed -ibak 's/ENV{DM_UDEV_DISABLE_OTHER_RULES_FLAG}=="1", ENV{SYSTEMD_READY}="0"/ENV{DM_UDEV_DISABLE_OTHER_RULES_FLAG}=="1", GOTO="systemd_end"/g' /usr/lib/udev/rules.d/99-systemd.rules
       args: