Builder which sets the time to idle for an element before it expires. Is only used if the element is not eternal. This default can be overridden in {@link net.sf.ehcache.Element}
This property can be modified dynamically while the cache is operating.
@param timeToLiveSeconds the default amount of time to live for an element from its creation date
@return this configuration instance
@see #setTimeToLiveSeconds(long)