Migrating to Java 17 for Sonar.

Java 11 is no longer supported.

.github/workflows/maven-for-branches.yml

@@ -5,7 +5,7 @@ on:
     branches: [ master ]
 
 jobs:
-  # JDK8 build without Sonar, because Sonar requires JDK11 and we don't need to run Sonar on all JDKs anyway
+  # JDK8 build without Sonar, because Sonar requires JDK17 and we don't need to run Sonar on all JDKs anyway
   build8:
     name: Build on JDK 8
 
@@ -40,20 +40,21 @@ jobs:
       run: mvn -B clean verify -DCI=true
       working-directory: ./source
 
-  # JDK11 build with Sonar
-  build11:
-    name: Build on JDK 11
+  # JDK17 build with Sonar
+  build17:
+    name: Build on JDK 17
 
     runs-on: ubuntu-latest
 
     steps:
       - uses: actions/checkout@v2
         with:
           fetch-depth: 0  # Shallow clones are disabled for a better relevancy of analysis
-      - name: Set up JDK 11
-        uses: actions/setup-java@v1
+      - name: Set up JDK 17
+        uses: actions/setup-java@v4
         with:
-          java-version: 11
+          java-version: 17
+          distribution: temurin
       - name: Cache SonarCloud packages
         uses: actions/cache@v1
         with:

.github/workflows/maven-for-pull-requests.yml

@@ -38,19 +38,20 @@ jobs:
       run: mvn -B clean verify -DCI=true
       working-directory: ./source
 
-  build11:
-    name: Build on JDK 11
+  build17:
+    name: Build on JDK 17
 
     runs-on: ubuntu-latest
 
     steps:
       - uses: actions/checkout@v2
         with:
           fetch-depth: 0  # Shallow clones are disabled for a better relevancy of analysis
-      - name: Set up JDK 11
-        uses: actions/setup-java@v1
+      - name: Set up JDK 17
+        uses: actions/setup-java@v4
         with:
-          java-version: 11
+          java-version: 17
+          distribution: temurin
       - name: Cache Maven packages
         uses: actions/cache@v1
         with: