findAll should query adapter if previous query is expired.

[antoinebrault]

Currently, if i use reap = "none", findAll() always returns cached data even if it is expired.

Similar to #154, I think there should be a way to refresh data with findAll when previous query is expired instead of refreshing on reapInterval with reap="refresh".

Maybe something along the lines of:

// force a new request
if (options.bypassCache || !options.cacheResponse) {
  delete resource.completedQueries[queryHash];
  delete resource.queryData[queryHash];
}
if (queryHash in resource.completedQueries && resource.completedQueries[queryHash] + options.maxAge >= new Date().getTime()) {
 // ...
}
}).then(function (items) {
    if (!items) {
        if (!(queryHash in resource.pendingQueries)) {

[jmdobry]

Sounds good. PR?