Merge pull request #6301 from gitterHQ/devel

Pagerduty improvements
update version added info
Added --no-recommends option
Changed version_added
Update zypper

Modified "Version_added"
Update version_added
playbook: permit the serial attribute to be a pecentage string as well as well as a straight integer
Correct placement of right parenthesis.

(serial_pct)/100.0 is a typo - the parentheses should be around the entire percentage calculation, which makes much more sense when multiplying by the number of hosts (luckily BODMAS prevailed).
Add example of rolling update using a percentage.
Revise documentation versioning.
Merge pull request #7293 from dhobbs/patch-1

Update user mailing list link in faq.rst
Merge pull request #7725 from slapers/network-secondaries-issue

fix incorrect secondary ip handling, fixes #7724
Merge pull request #7314 from bonifaido/patch-1

Ansible inventory file location fixed
Merge pull request #8002 from prune998/patch-2

added missing force flag on mkfs commandline
Merge branch 'devpopol-fixes/docker-volumes' into devel
Merge branch 'docker-add-net-parameter' of https://github.com/discordianfish/ansible into discordianfish-docker-add-net-parameter
Merge pull request #7765 from samdolan/devel

Raise exception if "file_name" isn't passed to bin/ansible-vault
Add validate_certs option to apt_repository
Update version_added info.
Updating version_added for docker net param and adding an example