[MWRAPPER-14] decouple back Wrapper version from Maven version

Author: hboutemy

maven-wrapper/src/main/java/org/apache/maven/wrapper/MavenWrapperMain.java

@@ -47,8 +47,10 @@ public class MavenWrapperMain
 
     public static final String MVNW_REPOURL = "MVNW_REPOURL";
 
+    public static final String MVN_VERSION = "3.8.3";
+
     public static final String MVN_PATH =
-        "org/apache/maven/apache-maven/" + wrapperVersion() + "/apache-maven-" + wrapperVersion() + "-bin.zip";
+        "org/apache/maven/apache-maven/" + MVN_VERSION + "/apache-maven-" + MVN_VERSION + "-bin.zip";
 
     public static void main( String[] args )
         throws Exception