Add PermitRootLogin option in sshd_config before leapp.

One of the pre-requisites for leapp tool to be able to upgrade
is the existence of the PermitRootLogin option in the
sshd_config file. It doesn't mind which value it has, it needs
to be set. For that reason, this patch will set the value to
without-password (which is the default for the PermitRootLogin
field).

The selection of the option isn't really relevant, as during
the installation of the openstack services puppet will just
overwrite the sshd_config, therefore this is simply a hack
for leapp to let us upgrade.

Change-Id: Id647896fda6cc3fe7bf5eb5ba2de05111d174092
(cherry picked from commit d8e5ccb8cb)
(cherry picked from commit 3e2a8d91cf)

deployment/tripleo-packages/tripleo-packages-baremetal-puppet.yaml

@@ -252,7 +252,15 @@ outputs:
                 path: "/etc/leapp/transaction/to_install"
                 line: "{{ item }}"
               loop: "{{ pkg_to_install }}"
-
+            - name: "check sshd_config file"
+              stat:
+                path: "/etc/ssh/sshd_config"
+              register: sshd_config_result
+            - name: "add PermitRootLogin option for leapp"
+              lineinfile:
+                path: "/etc/ssh/sshd_config"
+                regexp: "^(# *)?PermitRootLogin"
+                line: "PermitRootLogin without-password"
         - name: system_upgrade_prepare step 4
           tags:
             - never