Add Job for mistral-docker-imagebuild

This is experimental job. The purpose of this job
is to check correctness of the script and to calculate
the time for building this image.

We will take decision whether to move this job to
gate or periodic base on the building time.

Change-Id: I0a7fe1539d5ef30b305061f60ff34ec774be7545

jenkins/jobs/mistral.yaml

@@ -39,3 +39,35 @@
     publishers:
       - devstack-logs
       - console-log
+
+- job:
+    name: 'gate-mistral-docker-buildimage'
+    node: bare-trusty
+
+    builders:
+      - link-logs
+      - net-info
+      - gerrit-git-prep
+      - shell: |
+          #!/bin/bash -xe
+          if [ -x "/usr/bin/apt-get" ]; then
+             sudo -E apt-get update
+             sudo -E apt-get install -y docker.io
+          elif [ -x "/usr/bin/yum" ]; then
+             sudo -E yum install -y docker-io gpg
+          else
+             echo "No supported package manager installed on system. Supported: apt, yum"
+             exit 1
+          fi
+          docker build -t mistral-docker .
+          docker save mistral-docker | gzip >  mistral-docker.tar.gz
+
+    publishers:
+      - scp:
+          site: 'tarballs.openstack.org'
+          files:
+            - source: 'mistral-docker.tar.gz'
+              target: 'tarballs/mistral/images'
+              keep-hierarchy: false
+              copy-after-failure: false
+      - console-log