"No op" implementation of document store.

This is 'placeholder' implementation used if there is no document store service found
and if there is an attempt to use the document store features an error will be thrown.

/**
 * "No op" implementation of document store.
 * <p>
 * This is 'placeholder' implementation used if there is no document store service found
 * and if there is an attempt to use the document store features an error will be thrown.
 * </p>
 */
package io.ebeanservice.docstore.none;