[mdbci] Maria DB Continuous integration tool

• create mdbci up unit-test that generate Vagrantfile for default box and product definition (create template dir with Vagrantfile and roles)
• mdbci up created template from dir
• check exit_status

Example code:

name = "build_test",
box = "centos6",
product = "mariadb" 
version = "5.5",
repo = "http://yum.mariadb.org/",
repo_key = "https://yum.mariadb.org/" 
# other variables
# generate Vagrantfile and nodes for test template
$session.generate(name, box, product, ...)
# up template from dir
args = "test_dir" 
exit_code = up(args)
# check values
exit_code.should eq(0)  # success
exit_code.should eq(1)  # error

• base for other mdbci tests:
  1. ./mdbci up - first
  2. mdbci network
  3. mdbci ssh
  4. other mdbci commands