CodeMod apache::thrift::async::TEventBase to folly::EventBase.
CodeMod apache::thrift::async::TEventBase to folly::EventBase.

Summary: [Thrift] CodeMod apache::thrift::async::TEventBase to folly::EventBase.

Test Plan: CI.

Reviewed By: @alandau, @mdordal

Differential Revision: D2349828

fb-gh-sync-id: a3da6dca721d5fb206bc48f049331b76ade5bf11

zhlong73/mcrouter,facebook/mcrouter,synecdoche/mcrouter,reddit/mcrouter,synecdoche/mcrouter,nvaller/mcrouter,nvaller/mcrouter,yqzhang/mcrouter,nvaller/mcrouter,facebook/mcrouter,nvaller/mcrouter,facebook/mcrouter,zhlong73/mcrouter,zhlong73/mcrouter,yqzhang/mcrouter,zhlong73/mcrouter,synecdoche/mcrouter,facebook/mcrouter,yqzhang/mcrouter,reddit/mcrouter,reddit/mcrouter,yqzhang/mcrouter,synecdoche/mcrouter,reddit/mcrouter