Virtual machine management

*WORK IN PROGRESS*

CLI usage:

  $ ruby vmmgt/script/drive_vs.rb 
  You can control the virtualisation power buddy !
  
  Usage:
    ./drive_vs.rb create ENV VMNAME
    ./drive_vs.rb destroy ENV VMNAME
    ./drive_vs.rb start ENV VMNAME
    ./drive_vs.rb stop ENV VMNAME
    ./drive_vs.rb reset ENV VMNAME
    ./drive_vs.rb setcpu ENV VMNAME CPUCOUNT
    ./drive_vs.rb setram ENV VMNAME RAMSIZE
    ./drive_vs.rb changevlan ENV VMNAME VLAN_LABEL CARD_ID
    ./drive_vs.rb adddisk ENV VMNAME SIZE DATASTORE
    ./drive_vs.rb status ENV VMNAME

  $ ruby vmmgt/bin/drive_vs.rb create lab vmtest
  Let's create a new VM !
  { 'state' => 'success', 'error' => nil }
  
Development:

  driver = VmMgt::Driver.plop('myenv', 'vmware')
  driver.start_vm('myservername')

Dependencies:

  gem install rbvmomi

Todo:
* Return the MAC address when the creation succeed
* Write the MCollective agent
* Exception for the connection
* Add a guest id management to choose the right operating system