[Java] Fixed defaultValue escaping in Vert.x server template

Created by: MarcelTon

Line 55 and 84 were missing the triple-HTLM escape brackets (line 71 had this correctly) leading to code generation such as:

        vertx.eventBus().<JsonObject> consumer(LISTACCOUNTS_SERVICE_ID).handler(message -> {
            try {
                // Workaround for #allParams section clearing the vendorExtensions map
                String serviceId = "listAccounts";
                String emailAddressParam = message.body().getString("emailAddress");
                String emailAddress = (emailAddressParam == null) ? null : emailAddressParam;
                JsonArray profileIdParam = message.body().getJsonArray("profileId");
                List<String> profileId = (profileIdParam == null) ? new ArrayList&lt;&gt;() : Json.mapper.readValue(profileIdParam.encode(),
                    Json.mapper.getTypeFactory().constructCollectionType(List.class, String.class));
                String schoolIdParam = message.body().getString("schoolId");
                String schoolId = (schoolIdParam == null) ? null : schoolIdParam;
                service.listAccounts(emailAddress, profileId, schoolId).subscribe(
                    result -> {
                        message.reply(new JsonArray(Json.encode(result)).encodePrettily());
                    },
                    error -> {
                        manageError(message, error, "listAccounts");
                    });
            } catch (Exception e) {
                logUnexpectedError("listAccounts", e);
                message.fail(MainApiException.INTERNAL_SERVER_ERROR.getStatusCode(), MainApiException.INTERNAL_SERVER_ERROR.getStatusMessage());
            }
        });

Note the ArrayList<>() notation.