django_manage: Pass --noinput to migrate

The django 'migrate' command should receive the --noinput command,
otherwise it can block waiting for user input.
make name the parameter, with hostname as alias

name is used throughout Ansible, it's the "standard". This change
applies that standard to the add_host routine and updates the docs to
reflect that. Related to https://github.com/ansible/ansible/pull/3254
datadog_event module requires urllib2, not httplib2.
Merge pull request #3264 from arturaz/devel

datadog_event module requires urllib2, not httplib2.
Merge pull request #3260 from lorin/migrate-noinput

django_manage: Pass --noinput to migrate
Merge pull request #3262 from j2sol/add-host-name

make name the parameter, with hostname as alias