Add pipelines for SLFO Snapshot

- Add pipeline to release SUSE:SLFO:Main:Build to
  SUSE:SLFO:Main:Build:Snapshot when standard repository finishes the
  build

gocd/slfo.target.gocd.yaml

@@ -0,0 +1,46 @@
+format_version: 3
+pipelines:
+  SLFO.Standard:
+    group: SLFO.Target
+    lock_behavior: unlockWhenFinished
+    materials:
+      repos:
+        git: git://botmaster.suse.de/suse-repos.git
+        auto_update: true
+        whitelist:
+          - SUSE:SLFO:Main:Build_-_standard.yaml
+        destination: repos
+      scripts:
+        auto_update: true
+        git: https://github.com/openSUSE/openSUSE-release-tools.git
+        whitelist:
+          - DO_NOT_TRIGGER
+        destination: scripts
+    environment_variables:
+      OSC_CONFIG: /home/go/config/oscrc-staging-bot
+    stages:
+    - Expect.Standard.To.Finish:
+        resources:
+        - staging-bot
+        tasks:
+        - script: |
+            export PYTHONPATH=scripts
+            ./scripts/gocd/verify-repo-built-successful.py -A https://api.suse.de -p SUSE:SLFO:Main:Build -r standard
+
+    - Release.Standard.To.Snapshot:
+        roles:
+        - SLE
+        environment_variables:
+          OSC_CONFIG: /home/go/config/oscrc-totest-manager
+        resources:
+        - staging-bot
+        tasks:
+        - script: |-
+            set -e
+            osc -A https://api.suse.de release SUSE:SLFO:Main:Build
+            sleep 600
+            while (osc -A https://api.suse.de/ api "/build/SUSE:SLFO:Main:Build:Snapshot/_result?view=summary&repository=standard" | grep "result project" | grep -v 'code="published" state="published">'); do
+                echo PENDING
+                sleep 600
+            done
+            osc -A https://api.suse.de/ api "/build/SUSE:SLFO:Main:Build:Snapshot/_result?view=summary&repository=standard" | grep "result project" | grep 'code="published" state="published">' && echo PUBLISHED