don't user jinja2 templating in when statements

fixes warning:

[WARNING]: when statements should not include jinja2 templating delimiters such as {{ }} or {% %}.
in etckeeper role: `Found: email_configured.stdout != "{{etckeeper_user_email}}"

tasks/etckeeper.yml

@@ -50,7 +50,7 @@
   args:
     chdir: /etc
     warn: off
-  when: name_configured.stdout != "{{etckeeper_user_name}}"
+  when: name_configured.stdout != etckeeper_user_name
 
 - name: "check git user.email"
   command: git config user.email
@@ -66,7 +66,7 @@
   args:
     chdir: /etc
     warn: off
-  when: email_configured.stdout != "{{etckeeper_user_email}}"
+  when: email_configured.stdout != etckeeper_user_email
 
 
 - name: "enable commit mails"