TRT-1107: move neverstable cron script here for GH app auth

scripts/cronjob-update-neverstable.sh

@@ -0,0 +1,32 @@
+#!/bin/bash
+set -x
+set -o errexit
+set -o pipefail
+
+# This repo is assumed checked out in current directory
+git checkout -b update
+
+# Generate and push mapping
+OUTPUT=$(./scripts/update-neverstable.sh)
+
+if git diff --quiet
+then
+  echo "No changes."
+  exit 0
+fi
+
+# get token with write ability (after slow work is done; do not give the token a chance to expire)
+keyfile="${GHAPP_KEYFILE:-/secrets/ghapp/private.key}"
+set +x
+trt_token=`gh-token generate --app-id 1046118 --key "$keyfile" --installation-id 57361690 --token-only`  # 57361690 = openshift-trt
+git remote add openshift-trt "https://oauth2:${trt_token}@github.com/openshift-trt/sippy.git"
+set -x
+
+git commit -a -m "Update never-stable"
+git push openshift-trt update --force
+
+pr-creator -org openshift -repo sippy -source openshift-trt:update -branch master \
+	   -github-app-private-key-path "${keyfile}" -github-app-id 1046118 \
+	   -body "**Note: PLEASE REVIEW CHANGES BEFORE MERGING**<br><br>$OUTPUT" \
+	   -title "Automated - Update never-stable" \
+	   -confirm