Use Java 17

Author: tonihele

JME3TestsTemplate/nbproject/project.properties

@@ -40,8 +40,8 @@ javac.classpath=\
 # Space-separated list of extra javac options
 javac.compilerargs=
 javac.deprecation=false
-javac.source=11
-javac.target=11
+javac.source=17
+javac.target=17
 javac.test.classpath=\
     ${javac.classpath}:\
     ${build.classes.dir}