How to downgrade docker-1.9.1 to docker-1.8.2

Issue

• How to downgrade docker-1.9.1 to docker-1.8.2
• yum update installs unsupported docker-1.9 on OSE 3.1 https://bugzilla.redhat.com/show_bug.cgi?id=1341142

• Got Transaction check error when running yum downgrade docker-1.8.2 docker-selinux-1.8.2

  Transaction check error:
   file /etc/sysconfig/docker from install of docker-1.8.2-10.el7.x86_64 conflicts with file from package docker-common-1.9.1-40.el7.x86_64
   file /usr/bin/docker from install of docker-1.8.2-10.el7.x86_64 conflicts with file from package docker-common-1.9.1-40.el7.x86_64