ntp_client: enterprise compatible
Merge pull request #408 from tzz/feature/ntp_enterprisify

ntp_client: enterprise compatible
cf-dc-api.pl: add activation priority field
Merge pull request #409 from tzz/feature/activation-priorities

cf-dc-api.pl: add activation priority field
cf-sketch.pl: exit 0 if --apitest is successful, exit 1 otherwise
Merge pull request #410 from tzz/feature/apitest-exit-appropriately

cf-sketch.pl: exit 0 if --apitest is successful, exit 1 otherwise
cf-dc-api.pl: fix case of missing priority
stigs: new sketch
stigs: add changes from jborozan and refactor
stigs: add further changes from jborozan
Merge pull request #402 from tzz/feature/stigs

stigs: new sketch
sudoers: add another test related to https://github.com/cfengine/design-center/pull/405
Merge pull request #411 from tzz/bugfix/sudoers

sudoers: add another test related to https://github.com/cfengine/design-center/pull/405
aws_s3: improve validation
aws_s3: no default block_device_mapping
cf-dc-api.pl: add selftest command
howto/dc_api.md: fix Markdown
Merge pull request #412 from tzz/feature/api-selftest

Feature: API selftest
Throw error result when constructing validation object if encountered.
AWS_S3 validation array_k and array_v should be array type.