java: Various CI improvements

This bulk update includes

* Use Eclipse Temurin instead of Azul Zulu
* Set fail-fast: true on matrix strategies to reduce CI time
* Use the junit-jupiter aggregator module instead of junit-jupiter-engine
* Use single quotes around values in yaml for consistency

Author: mpkorstanje

.github/workflows/test-java.yml

@@ -22,20 +22,20 @@ jobs:
   test-java:
     runs-on: ${{ matrix.os }}
     strategy:
-      fail-fast: false
+      fail-fast: true
       matrix:
         os:
           - ubuntu-latest
-        java: ["17", "21"]
+        java: ['17', '21']
 
     steps:
       - uses: actions/checkout@v5
 
       - uses: actions/setup-java@v5
         with:
-          distribution: "zulu"
+          distribution: 'temurin'
           java-version: ${{ matrix.java }}
-          cache: "maven"
+          cache: 'maven'
 
       - run: mvn verify
         working-directory: java