remove FQCN from roles in examples (#404)

Ansible does not work with FQCN and collections sepcified for including
roles. It is currently expecting to only get the role name in this
context.

Verified with Ansible 2.10.5

Signed-off-by: Martin Schurz <[email protected]>

roles/mysql_hardening/README.md

@@ -24,7 +24,7 @@ It configures:
   collections:
     - devsec.hardening
   roles:
-    - devsec.hardening.mysql_hardening
+    - mysql_hardening
 ```
 
 This role expects an existing installation of MySQL or MariaDB. Please ensure that the following variables are set accordingly:

roles/nginx_hardening/README.md

@@ -83,7 +83,7 @@ It works with the following nginx-roles, including, but not limited to:
   collections:
     - devsec.hardening
   roles:
-    - devsec.hardening.nginx_hardening
+    - nginx_hardening
 ```
 
 [nginx_client_body_buffer_size]: http://nginx.org/en/docs/http/ngx_http_core_module.html#client_body_buffer_size

roles/os_hardening/README.md

@@ -219,7 +219,7 @@ To prevent some of the filesystems from being disabled, add them to the `os_file
   collections:
     - devsec.hardening
   roles:
-    - devsec.hardening.os_hardening
+    - os_hardening
 ```
 
 ## Changing sysctl variables
@@ -232,7 +232,7 @@ So for example if you want to change the IPv4 traffic forwarding variable to `1`
   collections:
     - devsec.hardening
   roles:
-    - devsec.hardening.os_hardening
+    - os_hardening
   vars:
     sysctl_overwrite:
       # Enable IPv4 traffic forwarding.

roles/ssh_hardening/README.md

@@ -244,7 +244,7 @@ Warning: This role disables root-login on the target server! Please make sure yo
   collections:
     - devsec.hardening
   roles:
-    - devsec.hardening.ssh_hardening
+    - ssh_hardening
 ```
 
 ## Configuring settings not listed in role-variables
@@ -258,7 +258,7 @@ Example playbook:
   collections:
     - devsec.hardening
   roles:
-    - devsec.hardening.ssh_hardening
+    - ssh_hardening
   vars:
     ssh_custom_options:
       - "Include /etc/ssh/ssh_config.d/*"