bump to java 21 and adds unit test for Movie dao

Author: Fabio Borriello

.github/workflows/codeql-analysis.yml

@@ -52,11 +52,11 @@ jobs:
         # Details on CodeQL's query packs refer to : https://docs.github.com/en/code-security/code-scanning/automatically-scanning-your-code-for-vulnerabilities-and-errors/configuring-code-scanning#using-queries-in-ql-packs
         # queries: security-extended,security-and-quality
 
-    # JDK 24 setup
+    # JDK 21 setup
     - name: "JDK set-up"
       uses: actions/setup-java@v5
       with:
-        java-version: '24'
+        java-version: '21'
         distribution: 'adopt'
     # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
     # If this step fails, then you should remove it and run the build manually (see below)

.github/workflows/github-default-actions.yml

@@ -15,7 +15,7 @@ jobs:
       - name: "JDK set-up"
         uses: actions/setup-java@v5
         with:
-          java-version: '24'
+          java-version: '21'
           distribution: 'adopt'
       - name: "Build and run tests"
         run: |

pom.xml

@@ -11,9 +11,9 @@
 
     <properties>
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-        <java.version>24</java.version>
-        <maven.compiler.source>${java.version}</maven.compiler.source>
-        <maven.compiler.target>${java.version}</maven.compiler.target>
+        <jdk.version>21</jdk.version>
+        <maven.compiler.source>${jdk.version}</maven.compiler.source>
+        <maven.compiler.target>${jdk.version}</maven.compiler.target>
         <spring.lib.version>4.0.0</spring.lib.version>
         <bull.version>3.0.0</bull.version>
         <lombok.version>1.18.42</lombok.version>