if security_sshd_permit_root_login is not set to yes, we should
override this and template a "no", instead of templating a "no"
when the value is set to yes.
Conflicts:
templates/sshd_config_block.j2
Change-Id: I747a8818762119eee63fa03d175b66ae4021f6da
Closes-Bug: #1685194
(cherry picked from commit 2cf232ae62)