[patch] cleanup: Drop LVM filter disable

[patch] cleanup: Drop LVM filter disable

Now we explicitly add a LVM PV on /dev/sda{1,2} for Cinder storage,
so we can safely drop the patch disabling LVM volume filtering.
If we later move the PV to a different disk, we can just add the VG
and LV definitions to linux:storage via reclass, and Salt will skip
setting them up (as they're already created by MaaS), yet keep the
filtering sane.

While at it, fix 'nova_cpu_pinning' param expr; constructs based on
reclass interpolation (e.g. '${_param:x}') do not work when
parameters are passed via reclass.storage templating, so change
reclass interpolation syntax with classic YAML anchors.

Fixes: 672ae12

Change-Id: Ieb41635ddeb630543d7e4d1079f45d636d9a43af
Signed-off-by: Alexandru Avadanii <Alexandru.Avadanii@enea.com>