Add CDA+REST test (closes: #1440)

Status Job ID Name Coverage
  Build
passed #3423
build_bionic

00:02:49

passed #3422
build_stretch

00:02:12

 
  Sign
failed #3424
sign

00:00:11

 
Name Stage Failure
failed
sign Sign
$ ci-sign-pkg
========================================================================
=
= Configure and check
=
declare -x CI_COMMIT_REF_NAME="llng-2.0-improvements"
declare -- RESULT_DIR="result"
ci-sign-pkg: use GPG_PRIVATE_KEY (runner) or GPG_USER_ID (workstation)
ERROR: Job failed: exit code 1