Update commit/license checks in CI to use mendertesting Pipelines

This is the "new way" to perform such checks, so that any change in the
testing repo does not require an update in local licenses checksum file.

Changelog: None

Signed-off-by: Lluis Campos <lluis.campos@northern.tech>

.gitlab-ci.yml

@@ -3,31 +3,17 @@ image: docker:git
 variables:
   DOCKER_REPOSITORY: mendersoftware/mender-convert
 
+include:
+  - project: 'Northern.tech/Mender/mendertesting'
+    file: '.gitlab-ci-check-commits.yml'
+  - project: 'Northern.tech/Mender/mendertesting'
+    file: '.gitlab-ci-check-license.yml'
+
 stages:
   - test
   - build
   - test_acceptance
 
-test:
-  stage: test
-  before_script:
-    - apk add --no-cache bash perl-utils
-    # Rename the branch we're on, so that it's not in the way for the
-    # subsequent fetch. It's ok if this fails, it just means we're not on any
-    # branch.
-    - git branch -m temp-branch || true
-    # Git trick: Fetch directly into our local branches instead of remote
-    # branches.
-    - git fetch origin 'refs/heads/*:refs/heads/*'
-    # Get last remaining tags, if any.
-    - git fetch --tags origin
-    - git clone http://github.com/mendersoftware/mendertesting
-  script:
-    # Check commit compliance.
-    - mendertesting/check_commits.sh
-    # Check licenses
-    - mendertesting/check_license.sh
-
 build:
   stage: build
   services:

LIC_FILES_CHKSUM.sha256

@@ -1,2 +1 @@
 beb140be4cd64599bedc691a55b2729c9cc611a4b9d6ec44e01270105daf18a2  LICENSE
-beb140be4cd64599bedc691a55b2729c9cc611a4b9d6ec44e01270105daf18a2  mendertesting/LICENSE