Only enable ssh, not start

There is an unusual issue occurring when the ssh daemon is asked to
start when it is already running. This patch ensures that the ssh
daemon is running but it doesn't try to start it. The handler will
take care of restarting sshd later on in the role.

Change-Id: I544cb4bffe7e41d0614ebea6a47c91e617647866

tasks/rhel7stig/sshd.yml

@@ -74,10 +74,9 @@
     - RHEL-07-040670
     - RHEL-07-040680
 
-- name: Ensure sshd is running and enabled
+- name: Ensure sshd is enabled at boot time
   service:
     name: "{{ ssh_service }}"
-    state: started
     enabled: yes
   when:
     - security_enable_sshd | bool