Add simple test with patch operation

Next items implemented:
* template for tests with patch
* template for test with rollback
* test generation for patch, depend on snapshots
  from previous runs. For ths case we should
  export env variable like
  SNAPSHOT='deploy_simple_flat, deploy_neutron_vlan'
* test generation for rollback, depends on snapshot
  from patch testing
* monkey_patch test method names to get readable
  nosetests report
Need TODO in separate patch:
* Add assertion for package verson and md5sum on slaves.
  This patch already reade and store this info in dict,
  but until we have testing repos assertion not added

Change-Id: I7c7490563eab490930ffdbf421a5697add20e08f
blueprint test-patches
Merge "Add simple test with patch operation"