private static URI addTrailingSlash(URI ztsUrl) {
        if (ztsUrl.getPath().endsWith("/"))
            return ztsUrl;
        else
            return URI.create(ztsUrl.toString() + '/');
    }
Default implementation of {@link ZtsClient}

@author bjorncs
@author mortent
vespa-athenz/src/main/java/com/yahoo/vespa/athenz/client/zts/DefaultZtsClient.java