default Optional<String> getDefaultServerName() {
        return Optional.empty();
    }
Returns the default server name for this {@link DbmsType}.
<p>
By default, {@code getDefaultServerName()} returns an empty {@link Optional},
since most database implementations don't use the server name. Implementations
that do require a server name, like Informix, should override this method.

@return the default server name
runtime-parent/runtime-core/src/main/java/com/speedment/runtime/core/db/DbmsTypeDefault.java