Make sure that we are only loading this once.
Avoiding NRE
RavenDB-2909 ResultTransformer AddQueryinput working with Sync Raven session - Exception in Async Raven session
Merge pull request #1619 from ppekrol/2.5

RavenDB-2909 ResultTransformer AddQueryinput working with Sync Raven ses...
RavenDB-2792 SQL Replication - if only document in batch is "recent touch" you get a tight loop
Merge pull request #1627 from ppekrol/2.5

RavenDB-2792 SQL Replication - if only document in batch is "recent touc...
Merge branch 'master' of https://github.com/ravendb/ravendb into 2.5