* ansible-test: Add Ubuntu 18.04 to Shippable CI nodes
* re-add ubuntu1604/3 to matrix
* forgot to add environment for git kill gpg-agent
(cherry picked from commit 828df4b336)
* ansible-test: Add Ubuntu 18.04 to Shippable CI nodes
* re-add ubuntu1604/3 to matrix
* forgot to add environment for git kill gpg-agent
(cherry picked from commit 828df4b336)