watchman: eden: remove deprecated rocket client stream usage
watchman: eden: remove deprecated rocket client stream usage

Summary:
D19204397 partially fixes the build breakage that impacted
eden and watchman.  This diff is also required to restore the cmake
build for watchman.

Reviewed By: iahs

Differential Revision: D19253435

fbshipit-source-id: 39472e12c6d791597c9e8fa9bf22bba881feb8e0

nodakai/watchman,nodakai/watchman,nodakai/watchman,facebook/watchman,facebook/watchman,nodakai/watchman,facebook/watchman,facebook/watchman,facebook/watchman,facebook/watchman,facebook/watchman,nodakai/watchman,nodakai/watchman,facebook/watchman,facebook/watchman,nodakai/watchman,nodakai/watchman,nodakai/watchman