Add global mvn check

Author: utas-raymondng

mvnw-ca

@@ -41,4 +41,10 @@ if command -v aws >/dev/null 2>&1 &&
   fi
 fi
 
-exec ./mvnw "$@"
+if command -v mvn >/dev/null 2>&1; then
+  echo "mvn exists"
+  mvn "$@"
+else
+  echo "mvn not found, use wrapper"
+  exec ./mvnw "$@"
+fi