Revert r217535 "Move swarm_client to swarming_client."

Revert r217535 "Move swarm_client to swarming_client."

The CL itself is fine but the Try Server didn't gather
"got_swarming_client_revision" build property correctly, causing swarm_triggered
to use an improper swarm_client checkout. r217535 can be reapplied once the TS
is fixed. No other issue was observed.

TBR=vadimsh@chromium.org
BUG=

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=217538

[M-A Ruel, 2013-08-14 13:22:27]

It saddens me to have to do this but I prefer not have all the try jobs use
swarm_client at a random revision.

http://build.chromium.org/p/tryserver.chromium/builders/linux_rel/builds/1591...
shows the sync of swarming_client at 51336a32732d4eea3f07e44e4a62c4d8103ef29f
but the build property got_swarming_client_revision is not set properly.

This causes
http://build.chromium.org/p/tryserver.chromium/builders/swarm_triggered/build...
to improperly checkout swarm_client instead of swarming_client.

Sigh.

[M-A Ruel, 2013-08-14 13:23:34]

Committed patchset #1 manually as r217538.

[M-A Ruel, 2013-08-14 13:26:15]

https://codereview.chromium.org/22978003/diff/1/chrome/interactive_ui_tests.i...
File chrome/interactive_ui_tests.isolate (right):

https://codereview.chromium.org/22978003/diff/1/chrome/interactive_ui_tests.i...
chrome/interactive_ui_tests.isolate:72:
'../tools/swarm_client/googletest/run_test_cases.py',
Actually, there was an error here. It needed to be swarming_client. I'll fix
this when I reapply the CL.