Fix wrong vif driver by default

Some changes have been done in Nova to have generic drivers:
http://tinyurl.com/VifDriver

This patchs aims to change default driver.

Closes-bug #1259139
Signed-off-by: Emilien Macchi <emilien.macchi@enovance.com>
Change-Id: I38ab21b7a3ae0f5b9ec4f08f5e30d2da58381cf1
Using contain_class instead of include_class

Per rspec-puppet-1.0.1 warning:

DEPRECATION: include_class is deprecated. Use contain_class instead.
Called from .../vendor/gems/rspec-puppet-1.0.1/lib/rspec-puppet/
matchers/include_class.rb:7

Change-Id: Ib70489d2ffdc1ff3de04d3a0462c0cace8d1b9ac
Merge "Fix wrong vif driver by default"
Merge "Using contain_class instead of include_class"