[autotest] Be able to pass in args when creating job from the AFE.

A number of tests require args to run. I added a textbox which takes a list of
comma seperated args. The client side will split and trim the input and send
it to RPC. I added a optional argument "args" to the rpc interface
"create_job". To ensure the RPC interface backward compatible,
I added the argument at the end.

BUG=chromium:374918
DEPLOY=afe,apache
TEST=ran afe, create job and type in args

Change-Id: I59df10d4d03dd23181623afdda29c3a683d3685e
Reviewed-on: https://chromium-review.googlesource.com/203011
Tested-by: Jiaxi Luo <jiaxiluo@chromium.org>
Reviewed-by: Simran Basi <sbasi@chromium.org>
Commit-Queue: Jiaxi Luo <jiaxiluo@chromium.org>
4 files changed