Fixing SQL Replication test
RavenDB-2769 Preparing json documents that need to be replicated to SQL database outside the scope executed concurrently to avoid concurrency issues.
Merge pull request #1439 from arekais/RavenDB-2769

Raven db 2769
Merge branch '2.5' of https://github.com/ayende/ravendb

Conflicts:
	Raven.Database/Bundles/SqlReplication/SqlReplicationTask.cs
	Raven.Tests/Bundles/SqlReplication/CanReplicate.cs
fixing after merge issues
formatting