mod_auth_gssapi: Fix keytab path config for CentOS 8

CentOS 8 doesn't apache doesn't read /etc/sysconfig/httpd anymore so
try to set keytab path location in apache config files.

roles/mod_auth_gssapi/files/gssapi.conf

@@ -0,0 +1,3 @@
+<Location />
+  GssapiCredStore keytab:/etc/httpd/httpd.keytab
+</Location>

roles/mod_auth_gssapi/tasks/main.yml

@@ -6,8 +6,10 @@
   notify: restart apache
 
 - name: set keytab path
-  lineinfile:
-    path: /etc/sysconfig/httpd
-    regexp: "^KRB5_KTNAME=.*"
-    line: KRB5_KTNAME=/etc/httpd/httpd.keytab
+  copy:
+    dest: /etc/httpd/conf.local.d/00-gssapi.conf
+    src: gssapi.conf
+    mode: 0644
+    owner: root
+    group: "{{ ansible_wheel }}"
   notify: restart apache