Run factory announcer on gocd

Ported the announcer to python3 and made the config parsing a little
easier. The current state is no longer stored as filename, but in a
config file

gocd/announcer.gocd.yaml

@@ -0,0 +1,36 @@
+format_version: 3
+pipelines:
+  Announcer.Factory:
+    group: openSUSE.Checkers
+    lock_behavior: unlockWhenFinished
+    environment_variables:
+      OSC_CONFIG: /home/go/config/oscrc-staging-bot
+    materials:
+      script:
+        git: https://github.com/openSUSE/openSUSE-release-tools.git
+    timer:
+      spec: 0 0 * ? * *
+      only_on_changes: false
+    stages:
+    - Run:
+        resources:
+          - staging-bot
+        tasks:
+          - script: ./factory-package-news/announcer.py --config config/announcer/openSUSE:Factory.yml --verbose --state-file /home/go/config/announcer.yaml
+  Announcer.Kubic:
+    group: openSUSE.Checkers
+    lock_behavior: unlockWhenFinished
+    environment_variables:
+      OSC_CONFIG: /home/go/config/oscrc-staging-bot
+    materials:
+      script:
+        git: https://github.com/openSUSE/openSUSE-release-tools.git
+    timer:
+      spec: 0 0 * ? * *
+      only_on_changes: false
+    stages:
+    - Run:
+        resources:
+          - staging-bot
+        tasks:
+          - script: ./factory-package-news/announcer.py --config config/announcer/openSUSE:Kubic.yml --verbose --state-file /home/go/config/announcer.yaml