Revert "backported the fix for RavenDB_1379 from 3.0 to 2.5"

This reverts commit a9ee52380302490e9dffff88289ad75753fdb3cc.

Conflicts:
	Raven.Database/DocumentDatabase.cs
Revert "backported the fix for RavenDB_1379 from 3.0 to 2.5"

This reverts commit a9ee52380302490e9dffff88289ad75753fdb3cc.

Conflicts:
	Raven.Database/DocumentDatabase.cs
Moving to await/async impl for async hi lo key gen
If we match on the tx etag, we don't need to continue checking
Add a failing test
RavenDB-1526 Search operator with RawQuery doesn't go through analysis
minor - revert the Studio debug URL
Use the FIDDLER symbol to avoid having a cross DNS security error when running with fiddler. In this case the studio URL is, http://localhost.fiddler:8080/ but the OAuth URL that is returned by the server is http://localhost:8080/. This leads so the cross DNS security error in Silverlight.