virtualbox scripts fail memory check

[Vasiliy Pleshakov]

script finds no 'top' or 'free' command and fails with awkward message.
OS: CYGWIN under Windows 7

Steps to reproduce:
1. get windows
2. install cygwin with default packages
3. download and unpack vbox scripts.
4. put MirantisOpenStack-5.1.iso in it's iso directory.
5. run launch.sh

Expected result: normal installing process.

Actual result: script fails with message:
"Your host has not enough memory.
You can allocate no more than -512MB, but trying to run VMs with 5632MB"

Workaround:
Install 'procps' package.

Impact: customer can be confused with negative amount of memory. Customer may not understand that scripts missing 'top' or 'free' command.

By default cygwin installs without 'top' or 'free' command. One should install 'procps' package manually in order to get those command.

Script should print warning message if it find no 'top' or 'free' command.
Script should print no negative amounts of memory in its message.

[Bartłomiej Piotrowski (bpiotrowski)]

Fixed in 7c989124.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/138238

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/138238
Committed: https://git.openstack.org/cgit/stackforge/fuel-docs/commit/?id=58e887e80c44eaa8d55be1ee9621da6edffceeab
Submitter: Jenkins
Branch: master

commit 58e887e80c44eaa8d55be1ee9621da6edffceeab
Author: Meg McRoberts <email address hidden>
Date: Mon Dec 1 19:30:21 2014 -0800

    VirtualBox: requires procps package on Windows/Cygwin

    Add procps to the list of Cygwin packages required
    to run the VirtualBox version of MOS on Windows systems.

    This fix is being applied to the 6.0 docs but it would
    be nice to cherrypick it to 5.1.1 as well.

    Change-Id: I1e484958f0f03ac3928dca095f16b4338b579bf7
    Closes-Bug:1380687