Fixing example build on server

[TimLethbridge]

The new ant build for manual examples fails in one case of compiling the code for W010SingletonMultiplicityOver12.ump with the message below.

This PR remporarily excluding this from the new way of running exampel tests so that this compiler version can be used for other purposes. May be an issue with ordering or leftover files (perhaps -r option should be used in Java compiler; may be to do with the version of Java. The failure occurs in Jenkins and on the main server with openjdk 14.0.2

    [java] Singleton class 'X' cannot have multiplicity greater than 1
     [java] W010SingletonMultiplicityOver12.ump:52: error: method getX in class Y cannot be applied to given types;
     [java]     if (y != null && !y.equals(aNewY) && equals(y.getX()))
     [java]                                                  ^
     [java]   required: int
     [java]   found:    no arguments
     [java]   reason: actual and formal argument lists differ in length
     [java] W010SingletonMultiplicityOver12.ump:59: error: method getX in class Y cannot be applied to given types;
     [java]     X anOldX = aNewY != null ? aNewY.getX() : null;
     [java]                                     ^
     [java]   required: int
     [java]   found:    no arguments
     [java]   reason: actual and formal argument lists differ in length
     [java] W010SingletonMultiplicityOver12.ump:69: error: cannot find symbol
     [java]         y.setX(this);
     [java]          ^
     [java]   symbol:   method setX(X)
     [java]   location: variable y of type Y
     [java] 3 errors