Since salt now also supports LV extend and reduce, the option Force must be used with care.

The changes include that force is only set if the corresponding LV does not yet exist (check via Grains) in order to overwrite any FS signatures (Wiping fs signature).

If the LV already exists (check via Grains), Force is set to False unless this is explicitly set to True in the pillars.

See salt issues #48309 #51925

* update lvm to create lv´s first

* add force: true  for "Wiping fs signature"

* update mount first

iteritems() was dropped in recent Python3 releases and items() is compatible
with Python 2.7.

Change-Id: If76a9d1aa3d23f3c38ec2135b42d63f64c4b1332

Change-Id: I556ab82a1dc0ce711958404165e419275ff5ce19

Change-Id: I9967f867b8695e4a5bc4759ca81eebe5ef2309c1

Change-Id: I93e135a9366c1f7c93397dfa0c342428fb64eb1c

Change-Id: Ib4cb70615af8da2f1037b0a43520c215365979ba

"names" makes a separate call to the package management frontend to
install each package, whereas "pkgs" makes just a single call so that it
improves performance.