RavenDB-2663 if there were no writes to index, we need to create index writer and persist empty index on disk to prevent index reset during database loading
Making sure that we don't try to auth an internal multi get request
Better handling if the temp timer header is not there.
Fixing merge issue which caused that the call of CreatePrefetchingBehavior didn't actually create the new instance of the prefetcher
RavenDB-2660 Introducing parallel processing of group if indexes which are classified based on their last indexed etags.
Merge branch 'RavenDB-2660' of https://github.com/arekais/ravendb
Merge branch 'master' of https://github.com/ppekrol/ravendb
Making sure we won't be trying to use an existing index id