Install screen and ssh client/server

This patch ensures that screen and ssh packages are installed. It
fulfills the requirmeents of these two STIGs:

* RHEL-07-010072
* RHEL-07-040260

Implements: blueprint security-rhel7-stig
Change-Id: Id30d586bfff8b34554195845a565d491c2ac76e2

doc/metadata/rhel7/RHEL-07-010072.rst

@@ -1,7 +1,7 @@
 ---
 id: RHEL-07-010072
-status: not implemented
-tag: misc
+status: implemented
+tag: packages
 ---
 
-This STIG requirement is not yet implemented.
+The role will ensure that the ``screen`` package is installed.

doc/metadata/rhel7/RHEL-07-040260.rst

@@ -1,7 +1,11 @@
 ---
 id: RHEL-07-040260
-status: not implemented
-tag: misc
+status: implemented
+tag: packages
 ---
 
-This STIG requirement is not yet implemented.
+The STIG requires that every system has an ssh client and server installed. The
+role installs the following packages:
+
+* CentOS: ``openssh-clients``, ``openssh-server``
+* Ubuntu: ``openssh-client``, ``openssh-server``

tasks/rhel7stig/packages.yml

@@ -31,9 +31,11 @@
     - auth
     - packages
     - services
+    - RHEL-07-010072
     - RHEL-07-021910
     - RHEL-07-020000
     - RHEL-08-020010
+    - RHEL-07-040260
     - RHEL-07-040500
     - RHEL-07-040560
 
@@ -55,8 +57,10 @@
     - auth
     - packages
     - services
+    - RHEL-07-010072
     - RHEL-07-021910
     - RHEL-07-020000
     - RHEL-08-020010
+    - RHEL-07-040260
     - RHEL-07-040500
     - RHEL-07-040560

vars/redhat.yml

@@ -86,6 +86,12 @@ stig_packages:
 
 # RHEL 7 STIG: Packages to add/remove
 stig_packages_rhel7:
+  - packages:
+      - openssh-client
+      - openssh-server
+      - screen
+    state: "{{ security_package_state }}"
+    enabled: True
   - packages:
       - rsh-server
     state: absent

vars/ubuntu.yml

@@ -90,6 +90,12 @@ stig_packages:
 
 # RHEL 7 STIG: Packages to add/remove
 stig_packages_rhel7:
+  - packages:
+      - openssh-clients
+      - openssh-server
+      - screen
+    state: "{{ security_package_state }}"
+    enabled: True
   - packages:
       - rsh-server
     state: absent