Move TAsyncTransport to folly as AsyncTransportWrapper
Summary:
This temporary class will be useful to cut dependencies on thrift
while (roughly) maintaining the old interface.
Fixup various test classes that depend on the interface. Next diff will be to cut fbthrift dep in proxygen/mcrouter
Test Plan: unit tests, jenkins
Reviewed By: hans@fb.com
Subscribers: fbcode-common-diffs@, andrewcox, alandau, bmatheny, alikhtarov, mshneer, trunkagent, doug, njormrod, folly-diffs@, davejwatson
FB internal diff:
D1696094
Signature: t1:
1696094:
1418762312:
6028815cce2845ac5f8e754132a038fabf5fd957