Update SSH Options for ansible-provision.sh

When ansible is going over a NAT Gateway or other intermdiate
network devices, the connection can time out if that device has
its own timeout setting for no traffic.  Setting the ServerAliveInterval
will ensure that there is data sent over the wire ever 30 seconds so the
connection does not get closed while running ansible tasks that take
over 5 minutes.

util/jenkins/ansible-provision.sh

@@ -24,6 +24,7 @@ env | grep -v AWS | grep -v ARN
 
 export PYTHONUNBUFFERED=1
 export BOTO_CONFIG=/var/lib/jenkins/${aws_account}.boto
+export ANSIBLE_SSH_ARGS='-o ControlMaster=auto -o ControlPersist=60s -o ControlPath="~/.ansible/tmp/ansible-ssh-%h-%p-%r" -o ServerAliveInterval=30'
 
 # docker on OS-X includes your Mac's home directory in the socket path
 # that SSH/Ansible uses for the control socket, pushing you over