pip installs are hanging for xqueue

We were hanging on this:

```
Obtaining pika from
git+https://github.com/pika/pika.git@a731347fc0#egg=pika (from -r
/edx/app/xqueue/xqueue/requirements.txt (line 14))
  git clone in /edx/app/xqueue/venvs/xqueue/src/pika exists with URL
git://github.com/pika/pika.git
  The plan is to install the git repository
https://github.com/pika/pika.git
What to do?  (s)witch, (i)gnore, (w)ipe, (b)ackup
```

this needs to default to false because it currently depends on

analytics-server

analytics-server is a private repo

makes an all-caps var for celery workers

Don't run pre-supervisor on abbey builds.

using serial var for all plays

Change the sudo permissions for sandbox.

Instead of rm directly we now do a find.

adding libfreetype6-dev

Ignore import errors until we care about them

Add folder plugin to Jenkins

adding config for xblock storage

add mongodb backup script

method arg bug

make the missing server case better

Adding aws vars for common role to work

refactoring

Jarv/migration check for sandbox clone