Updated the vfsstream framework tests to 1.3.0

Summary: This takes the percentage of passing test from `86.67%` to `89.04%`.
Closes https://github.com/facebook/hhvm/pull/3378

Reviewed By: @ptarjan

Differential Revision: D1491923
Revert "Enable most optimizations with loops"

Summary: This reverts commit 9f0c92ba1c1e9de9266b896d19874f45be5da325.

Was breaking hphp_dbgo_jit_loops run.

Reviewed By: @bertmaher, @ptarjan

Differential Revision: D1493916
Implement `idx` gdb command

Summary: Much like the corresponding PHP operation, `idx` is intended to take an
arbitrary container and an index and return container[index].  Currently
it only operates on vectors and generic objects, but support for more
containers is coming soon.

Reviewed By: @alexmalyshev

Differential Revision: D1493896
Updated the framework tests to a newer version of yii

Summary: We might as well test against a newer version of Yii since the version we are currently testing against is locked at how it was in February.
Closes https://github.com/facebook/hhvm/pull/3380

Reviewed By: @fredemmott

Differential Revision: D1488853

Pulled By: svcscm
added missing fclose() to free the handle after a test run

Summary: this prevents that the file handle leaks.
Closes https://github.com/facebook/hhvm/pull/3372

Reviewed By: @LiraNuna

Differential Revision: D1481200

Pulled By: svcscm
Fixed Exception in DoublyLinkedList::offsetUnset

Summary: zendtests are hopefully enough test coverage
Closes https://github.com/facebook/hhvm/pull/3391

Reviewed By: @fredemmott

Differential Revision: D1484805

Pulled By: svcscm
Fix an argument ordering bug in Redis lrem.

Summary: The PHP interface takes arguments in a different order than the redis server expects them.
Interchange (0-based) args 1 and 2 keyed off of the command name.

This fixes https://github.com/facebook/hhvm/issues/3357

A scan through the Redis PHP API documentation leads me to believe this is the only
instance wherein the PHP arguments are in a different order than the server arguments.
Closes https://github.com/facebook/hhvm/pull/3358

Reviewed By: @LiraNuna

Differential Revision: D1476999

Pulled By: svcscm
Use standard http reason for replay server

Summary: Closes https://github.com/facebook/hhvm/pull/3387

Reviewed By: @ptarjan

Differential Revision: D1484823

Pulled By: svcscm