Attributes were not copied over with the controls

[aaronlippold]

CHANGELOG.md:- use new InSpec attributes [\#10](https://github.com/dev-sec/cis-docker-benchmark/pull/10) ([chris-rock](https://github.com/chris-rock))
CHANGELOG.md:- determine attribute values at the beginning [\#1](https://github.com/dev-sec/cis-docker-benchmark/pull/1) ([chris-rock](https://github.com/chris-rock))
README.md:We use a yml attribute file to steer the configuration, the following options are available:
README.md:# run profile on remote host via SSH with sudo and define attribute value
README.md:inspec exec cis-docker-benchmark --attrs sample_attributes.yml
controls/container_images.rb:# attributes
controls/container_images.rb:CONTAINER_USER = attribute(
controls/container_runtime.rb:# attributes
controls/container_runtime.rb:CONTAINER_CAPADD = attribute(
controls/container_runtime.rb:APP_ARMOR_PROFILE = attribute(
controls/container_runtime.rb:SELINUX_PROFILE = attribute(
controls/docker_daemon_configuration.rb:# attributes
controls/docker_daemon_configuration.rb:DAEMON_TLSCACERT = attribute(
controls/docker_daemon_configuration.rb:DAEMON_TLSCERT = attribute(
controls/docker_daemon_configuration.rb:DAEMON_TLSKEY = attribute(
controls/docker_daemon_configuration.rb:AUTHORIZATION_PLUGIN = attribute(
controls/docker_daemon_configuration.rb:LOG_DRIVER = attribute(
controls/docker_daemon_configuration.rb:LOG_OPTS = attribute(
controls/docker_daemon_configuration.rb:SWARM_MODE = attribute(
controls/docker_daemon_configuration.rb:SWARM_MAX_MANAGER_NODES = attribute(
controls/docker_daemon_configuration.rb:SWARM_PORT = attribute(
controls/docker_daemon_configuration_files.rb:# attributes
controls/docker_daemon_configuration_files.rb:REGISTRY_CERT_PATH = attribute(
controls/docker_daemon_configuration_files.rb:REGISTRY_NAME = attribute(
controls/docker_daemon_configuration_files.rb:REGISTRY_CA_FILE = attribute(
controls/host_configuration.rb:TRUSTED_USER = attribute(
controls/host_configuration.rb:MANAGEABLE_CONTAINER_NUMBER = attribute(```

[HackerShark]

Added attributes as per commit: 707ac8f