[CI] Replacing Travis by GithubActions

.github/workflows/build.yml

@@ -0,0 +1,51 @@
+# This workflow will build a Java project with Maven, and cache/restore any dependencies to improve the workflow execution time
+# For more information see: https://docs.github.com/en/actions/automating-builds-and-tests/building-and-testing-java-with-maven
+
+# This workflow uses actions that are not certified by GitHub.
+# They are provided by a third-party and are governed by
+# separate terms of service, privacy policy, and support
+# documentation.
+
+name: Java CI
+
+on:
+  push:
+    branches: [ "master", "**" ]
+  pull_request:
+    types: [opened, synchronize, reopened]
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v3
+        with:
+          fetch-depth: 0  # Shallow clones should be disabled for a better relevancy of analysis
+      - name: Set up JDK
+        uses: actions/setup-java@v3
+        with:
+          # The JDK 21 causes a compilation error:
+          # Error: Class com.sun.tools.javac.tree.JCTree$JCImport does not have member field 'com.sun.tools.javac.tree.JCTree qualid'
+          java-version: '11'
+          distribution: 'temurin'
+          cache: maven
+      - name: Cache SonarCloud packages
+        uses: actions/cache@v3
+        with:
+          path: ~/.sonar/cache
+          key: ${{ runner.os }}-sonar
+          restore-keys: ${{ runner.os }}-sonar
+      - name: Cache Maven packages
+        uses: actions/cache@v3
+        with:
+          path: ~/.m2
+          key: ${{ runner.os }}-m2-${{ hashFiles('**/pom.xml') }}
+          restore-keys: ${{ runner.os }}-m2
+      - name: Build & test with Maven
+        run: mvn -B clean test
+#      - name: Sonar analysis
+#        env:
+#          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+#          SONAR_TOKEN: ${{ secrets.SONAR_TOKEN }}
+#          SONAR_HOST_URL: ${{ vars.SONAR_HOST_URL }}
+#        run: mvn -B verify -P coverage org.sonarsource.scanner.maven:sonar-maven-plugin:sonar -Dsonar.projectKey=Coreoz_HTTP-Gateway -Dsonar.organization=coreoz