Add github workflows

.github/dependabot.yml

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+version: 2
+updates:
+
+  # Maintain dependencies for GitHub Actions
+  - package-ecosystem: "github-actions"
+    directory: "/"
+    schedule:
+      interval: "daily"

.github/workflows/main.yml

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+name: CI
+
+on: pull_request
+
+jobs:
+  jjb:
+    runs-on: ubuntu-latest
+    name: Jenkins Job Builder
+    steps:
+      - uses: actions/checkout@v2
+      - name: Setup python
+        uses: actions/setup-python@v2
+        with:
+          python-version: '3'
+      - name: Restore pip cache
+        uses: actions/cache@v2
+        with:
+          path: ~/.cache/pip
+          key: ${{ runner.os }}-{{ runner.python-version }}-pip-${{ hashFiles('**/requirements*.txt') }}
+          restore-keys: |
+            ${{ runner.os }}-pip-
+      - name: Install dependencies
+        run: |
+          pip install -r requirements.txt
+      - name: Run tests
+        run: |
+          for d in theforeman.org; do
+            DIR="."
+            ( cd $d && jenkins-jobs -l debug test -r $DIR )
+            ( cd $d && jenkins-jobs test -r $DIR --config-xml -o output && find output -name config.xml -exec python ../jenkins-lint.py --xml {} + && rm -rf output )
+          done
+
+          for d in centos.org; do
+            DIR="jobs"
+            ( cd $d && jenkins-jobs -l debug test -r $DIR )
+            ( cd $d && jenkins-jobs test -r $DIR --config-xml -o output && find output -name config.xml -exec python ../jenkins-lint.py --xml {} + && rm -rf output )
+          done

requirements.txt

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+jenkins-job-builder
+lxml
+requests