Using wrong variable to replace tenant.

The shift configuration was wrong because the user name was set as tenant.
Dockerfile: clean up

This changes the Dockerfile to make the following improvements:
- stop adding the universe repo
it's already in the latest stackbrew/ubuntu images by default
- merge the apt-get update and install operations
- remove the package lists in the same apt-get update & install step
Merge pull request #227 from unclejack/update-Dockerfile

Dockerfile: clean up
Corrected package name for nginx-extras in nginx.conf
Merge pull request #228 from shreyu86/bugfix-documentation

Corrected package name for nginx-extras in nginx.conf
use setuptools
Cannot push centos image to registry: Broken Pipe

The metadata of the jar content "_files"  is to huge to to store it in glance
as property since it contains every file of the uploaded TAR.

The problem can be simple solved using the storage_alternate.

fixes #235
Concise bash for default variable values

Switching to consistently use the {$XXX:-default} syntax
over the multi-line if [[ -z ]] syntax.
Merge pull request #236 from chilicat/issue-235

Cannot push centos image to registry: Broken Pipe
Merge pull request #237 from drnic/concise_bash

Concise bash for default variable values
Merge pull request #224 from chilicat/patch-1

Openstack glance/swift - Using wrong variable to replace tenant.
app: Don't require Bugsnag if we don't use it

With this commit, we delay any bugsnag-related import errors until we
actually need the bugsnag module (which may be never, depending on the
user's config).
Merge pull request #241 from wking/optional-bugsnag

app: Don't require Bugsnag if we don't use it
Fix log message

Properly uses the name of the method where the entry is emitted.
Merge pull request #243 from davidhoyt/patch-1

Fix log message
README.md: Add config/ prefix to config_sample.yml

This catches the docks up with 900d262 (Moved config to the config/
directory, 2013-12-09).
Merge pull request #240 from wking/readme-config-location

README.md: Add config/ prefix to config_sample.yml
Merge pull request #233 from mmerickel/feature.setuptools

use setuptools
Fix test_layers tests. Tentative fix for #248
Merge pull request #249 from dotcloud/fix-tests

Fix test_layers tests. Tentative fix for #248