add open-ended-message to XQUEUE_QUEUES

due to https://github.com/edx/edx-platform/blob/master/common/lib/xmodule/xmodule/open_ended_grading_classes/openendedchild.py#L79

I added  open-ended-message to XQUEUE_QUEUES
initial working version
var fix.
New base AMI, updating AMIs for Ubuntu
Merge pull request #1558 from edx/han/sandbox-ami

New base AMI, updating AMIs for Ubuntu
whitelisting 10.0.0.0/8
Specifying subnets that are know to need API calls
Merge pull request #1561 from edx/e0d/no-auth-from-10

whitelisting 10.0.0.0/8
adds hostname to the logwatch for edp machines
updating other templates
Merge pull request #1562 from edx/jarv/add-hostname-to-logwatch

adds hostname to the logwatch for edp machines
changing name for better sorting
Merge pull request #1564 from edx/jarv/add-hostname-to-logwatch

changing name for better sorting
whitelisting /oath2
Merge pull request #1565 from edx/e0d/no-auth-from-10

whitelisting /oath2
Adding dash url
quotes
Merge pull request #1566 from edx/e0d/dash-url

Adding dash url
Adding default value to varible NEWRELIC_LICENSE_KEY
Add release option to Vagrant playbooks

Activated using an environment variable