* Salt minion is unable unencrypt the messages from master during boot
    because of lack of entropy, throwing the exception:

    File "/usr/lib/python2.7/dist-packages/salt/utils/rsax931.py", line 146, in sign
    raise SSLError('Unable to encrypt message')
    SSLError: Unable to encrypt message:
    error:80064191:lib(128):osrandom_init:getrandom() initialization failed with EAGAIN. Most likely Kernel CPRNG is not se
    error:80065190:lib(128):osrandom_rand_bytes:getrandom() initialization failed.
    error:04088003:rsa routines:RSA_setup_blinding:BN lib
    error:04066044:rsa routines:RSA_EAY_PRIVATE_ENCRYPT:internal error

    After node has been booted up, and /dev/random device collected some
    extra entropy, salt-minion could start.

    This patch configures libvirt vms to use /dev/urandom for faster
    entropy regeneration

Change-Id: I470166b4424752d24ac4bb2cb87d9f99cd14752e
Co-Authored-By: Oleksandr Savatieiev <osavatieiev@mirantis.com>
Prod-Related: PROD-19711

[Fix] Doc

Issue: - It is not possible to pass [R]andom [N]umber [G]enerator
         device to libvirt guest xml in order to control entropy.

       - Doc has no information on how to provision vms using salt

Solution: - Pass rng parameters via kwargs from node: pillar
            Attach rng xml object to generated xml.

          - Provide with an example

Prod-Related: PROD-19214
Customer-Found
Change-Id: Iea111f2d927edf46f06bb7ccfad06d37b752fba9

The patch deletes deprecated cmd.run function which actually
was defined in salt 2016 as alias for cmd.shell therefore this
change supports backward compatibility.

Change-Id: I47eae0b8ee45ca1a1a9b3e8e544c893614573fda
Related-PROD: 17056

Change-Id: I685de4207f1f7f17264cc4ad2d81c3348ca20074

Do not change VCP disk profile globally, it causes to re-use
the properties from one node in another.

Change-Id: Iff98010c32c1060b50bc0ae040edb72108c57da1

Example:

parameters:
  salt:
    control:
      size: #RAM 4096,8192,16384,32768,65536
        openstack.control:
          cpu: 8
          ram: 32768
          disk_profile: small_two_disks
          net_profile: default

  virt:
    disk:
      small_two_disks:
        - system:
            size: 50000
            image: http:/path/to/image.qcow2
        - cinder-volume:
            size: 50000

Change-Id: Ie092b77627cb2b1d36ba4b7a2a7d749ad91881c8