Fix the `-j` option to the load test script.

The help text needs an argument in order to instruct the `commander`
package to try to parse an argument.

Change-Id: Id0c493694c81d26404579fec7ece576c88706ce7
Move load testing scripts to `mw-ocg-service` package.

Helper scripts don't really belong in the deploy repository.

Change-Id: Ie8b3a565bb949fc1ff1913019382b7b62a505773
Updating to latest masters

Deployed new service (e603a4d79badfabdcd9c2cea6ec6606b18dfd116):
* Reduce default job lifetime from 5 days to 3 days.
* Disable folder size computation in health check unless explicitly requested.
  (bug 71260)
* Improve statistics collection and measure cache effectiveness.
* Various improvements to the load testing scripts.

Deployed new bundler (352f9e02316b698bce4fe4da42f0791ff5df591b):
* Use released version 1.1.0.

Deployed new latexer (0e4ec243d6087a940bbb0954697ba79c1235f772):
* Save and restore stack of inline decorations around environments, \item, etc.

Deployed new texter (07b0cc6f6ca1c13ec8ce3c1e06b665bb314f6653):
* Minor changes to travis infrastructure.

Change-Id: I539833a1cc8be48451e3620bfc617d19f0879f67
Merge branch 'master' into wmf-deploy

Change-Id: I9f4edb2547bddeb1f1fe032a04a6e35c97f7f450