[MNG-4971] Display maven home in version info

Submitted by: Guo Du

o Applied with minor modification

git-svn-id: https://svn.apache.org/repos/asf/maven/maven-3/trunk@1059267 13f79535-47bb-0310-9956-ffa450edef68

maven-embedder/src/main/java/org/apache/maven/cli/CLIReportingUtils.java

@@ -73,6 +73,8 @@ public static void showVersion( PrintStream stdout )
 
         stdout.println( msg );
 
+        stdout.println( "Maven home: " + System.getProperty( "maven.home", "<unknown maven home>" ) );
+
         stdout.println( "Java version: " + System.getProperty( "java.version", "<unknown java version>" )
             + ", vendor: " + System.getProperty( "java.vendor", "<unknown vendor>" ) );