[meta] add dedicated ci jobs for 6.x (#760)

This commit create dedicated Jenkins jobs for 6.x for master branch and
PRs. This is required to allow having different test suites for 7.x and
6.x in a following PR.

.ci/jobs/defaults.yml

@@ -12,12 +12,6 @@
     logrotate:
       daysToKeep: 30
       numToKeep: 100
-    parameters:
-    - string:
-        name: branch_specifier
-        default: master
-        description: the Git branch specifier to build (<branchName>, <tagName>,
-          <commitId>, etc.)
     properties:
     - github:
         url: https://github.com/elastic/ansible-elasticsearch/
@@ -41,10 +35,6 @@
         name: label
         values:
         - linux
-    - axis:
-        name: VERSION
-        filename: elasticsearch/test/matrix.yml
-        type: yaml
     - axis:
         name: OS
         filename: elasticsearch/test/matrix.yml
@@ -55,6 +45,25 @@
         type: yaml
     vault:
       role_id: cff5d4e0-61bf-2497-645f-fcf019d10c13
+    builders:
+    - shell: |-
+        #!/usr/local/bin/runbld
+        set -euo pipefail
+
+        export RBENV_VERSION='2.5.7'
+        export PATH="$HOME/.rbenv/bin:$PATH"
+        eval "$(rbenv init -)"
+        rbenv local $RBENV_VERSION
+
+        export ES_XPACK_LICENSE_FILE="$(pwd)/license.json"
+        echo "Getting xpack_license from secrets service"
+        set +x
+        VAULT_TOKEN=$( curl -s -X POST -H "Content-Type: application/json" -L -d "{\"role_id\":\"$VAULT_ROLE_ID\",\"secret_id\":\"$VAULT_SECRET_ID\"}" $VAULT_ADDR/v1/auth/approle/login | jq -r '.auth.client_token' )
+        curl -s -L -H "X-Vault-Token:$VAULT_TOKEN" $VAULT_ADDR/v1/secret/devops-ci/ansible-elasticsearch/xpack_license | jq -r '.data.value' > ${ES_XPACK_LICENSE_FILE}
+        set -x
+        echo "Finished getting xpack_license from secrets service"
+        make setup
+        make verify VERSION=$VERSION PATTERN=$TEST_TYPE-$OS
     wrappers:
     - ansicolor
     - timeout:
@@ -62,4 +71,3 @@
         timeout: 360
         fail: true
     - timestamps
-