Fixing ansible playbook for centos installation

Signed-off-by: Abhinandan Prativadi <abhi@docker.com>

contrib/ansible/tasks/bootstrap_centos.yaml

@@ -3,11 +3,11 @@
   yum:
     name: "{{ item }}"
     state: latest
-    with_items:
-      - unzip
-      - tar
-      - btrfs-progs-devel
-      - libseccomp-devel
-      - util-linux 
-      - socat
-      - libselinux-python
+  with_items:
+    - unzip
+    - tar
+    - btrfs-progs-devel
+    - libseccomp-devel
+    - util-linux 
+    - socat
+    - libselinux-python

contrib/ansible/tasks/k8s.yaml

@@ -25,7 +25,9 @@
     gpgcheck: yes
     enabled: yes
     repo_gpgcheck: yes
-    gpgkey: https://packages.cloud.google.com/yum/doc/yum-key.gpg
+    gpgkey: 
+      - https://packages.cloud.google.com/yum/doc/yum-key.gpg 
+      - https://packages.cloud.google.com/yum/doc/rpm-package-key.gpg
   when: ansible_distribution == "CentOS"
 
 - name: "Disable SELinux (CentOS)"