Force 17 as version also in sub-module trying to avoid Jenkins build issue

avatar-storage/pom.xml

@@ -13,6 +13,12 @@
 	<artifactId>avatar-storage</artifactId>
 	<packaging>jar</packaging>
 
+	<properties>
+		<java.version>17</java.version>
+		<maven.compiler.source>17</maven.compiler.source>
+		<maven.compiler.target>17</maven.compiler.target>
+	</properties>
+
 	<scm>
 		<connection>scm:git:https://code-repo.d4science.org/gCubeSystem/${project.parent.artifactId}.git</connection>
 		<developerConnection>scm:git:https://code-repo.d4science.org/gCubeSystem/${project.parent.artifactId}.git</developerConnection>