A little change to cache API in order to shorten code that creates cache

try {
    this.cache = Utils.getComponent(CacheManager.class).createNewCache(
        new CacheConfiguration(new LRUEvictionConfiguration(500), "xwiki.velocity_template_cache"));
} catch (CacheException ce) {
    LOG.warn("Creation of Velocity template cache failed - no caching will be performed", ce);
}