Dockerfile in kitchen-docker-2.12.0

- old
+ new

@@ -1,5 +1,5 @@
-FROM centos:6
+FROM centos:7
 RUN yum clean all
 RUN yum install -y sudo openssh-server openssh-clients which curl htop
 RUN ssh-keygen -t rsa -f /etc/ssh/ssh_host_rsa_key
 RUN ssh-keygen -t dsa -f /etc/ssh/ssh_host_dsa_key
 RUN mkdir -p /var/run/sshd