Fix setting Name tags and name attributes when creating some objects
in the EC2 driver.

Closes #322

Signed-off-by: Tomaz Muraus <tomaz@apache.org>
use _get_boolean() function instead of parsing api response in every method

Closes #324

Signed-off-by: Tomaz Muraus <tomaz@apache.org>
docs: Fix typo, update committer guide.
Node filters for ec2 driver

Closes #320

Signed-off-by: Tomaz Muraus <tomaz@apache.org>
use _build_filters function instead of specifying request params manually

Closes #323

Signed-off-by: Tomaz Muraus <tomaz@apache.org>