[split] Tagging MigrationClientTest test as flaky

RB_ID=244063
TBR=true
[split] Daemonize threads in ClientBuilders used in Finagle, Servo, and macaw-core.

Cases have been reported of Finagle services not dying when exceptions are
encountered in their main threads. This is caused by various cases of library
code embedding ClientBuilders, which default to using non-daemon threads. All
non-daemon threads must terminate before the JVM will shut down, so the apps
were left hanging.

RB_ID=244465
[split] [birdherd] move trends/adserver thrift deps to thrift-only (EPIC YAK SHAVE)

It all started with trying to remove birdherd's dependency on finagle-ostrich4.
Tugging at that thread necessitated almost a week of cleaning dependencies, updating
versions from VERY outdated generated clients, and fixing up all the resulting code
in birdherd, macaw-core, woodstar, etc.

Not gonna lie, it sucked.

But... this is a huge cleanup/update of birdherd/macaw thrift dependencies.

RB_ID=238299
TBR=true
[split] Resubmisison of commit "Daemonize threads in ClientBuilders used in library code".

Commit 06bdc15f52 seems to have been overridden by an unrelated change.

RB_ID=244465
[split] finagle-memcached: Add ClientBuilder APIs that use Name instead of Group

RB_ID=247221
[split] finagle-spdy: adds finagle-spdy to build.scala

RB_ID=248099
[split] util, finagle, scrooge: Remove deprecated withSources from Build.scala

RB_ID=248091
[split] finagle-core: increases default tcpConnectTimeout to 350ms

RB_ID=238849
[split] finagle-core: Adds a test to check that trivial clientbuilders services close properly

RB_ID=247779
[split] finagle-core: removes memory leak for never satisfied promises in delayed factory

RB_ID=245573
[split] finagle-core: +1 Exceptions Test, and fixes ServiceTimeoutException naming

RB_ID=245877
[split] bump util to 6.10.1-SNAPSHOT

RB_ID=251907
TBR=true
[split] bump finagle to 6.10.1-SNAPSHOT

RB_ID=252319
TBR=true
Merge branch 'tmp'
[split] finagle-kestrel: Make ReadHandle an abstract class for better Java compatibility

RB_ID=246161
[split] ServerSets2: First version

RB_ID=241349
[split] Revert "ServerSets2: First version"

RB_ID=252927
TBR=true
NO-QUEUE=true
[split] [macaw-core] Fix macaw JsonpFilter so that it only rejects actual jsonp requests!

RB_ID=251951
[split] finagle-core: allows clean shutdown for insoluble address

RB_ID=251833
[split] ServerSet2: First version

RB_ID=241349