Disable the signature check of the zabbix repo.

tasks/zabbix-agent-rh.yml

@@ -2,10 +2,15 @@
 - name: Repository and packages, RH/CentOS
   block:
   - name: Install the repository 
-    yum: name={{ zabbix_agent_centos_repo }} state=present
+    yum:
+      name: '{{ zabbix_agent_centos_repo }}'
+      state: present
+      disable_gpg_check: True
     when: "'zabbix-release' not in ansible_facts.packages"
 
   - name: Install the Zabbix agent package
-    yum: name={{ zabbix_agent_packages }} state=latest
+    yum:
+      name: '{{ zabbix_agent_packages }}'
+      state: latest
 
   tags: [ 'zabbix', 'zabbix_agent' ]