Failed builds leave temporary containers on node

Issue

After running a build that fails in a node, the container created to run the build remains there, it's not removed automatically. Even the node can run out of space when the number of temporary containers increases.

A new build fails:

$ oc logs failing-build-1-build 
Step 1 : FROM centos/ruby-22-centos7@sha256:b2637a0ae69beb30111425fd381d5ff01acb0d71e9d61b491c3eaba54e5428ef
 ---> 1f024693ec8a
Step 2 : RUN exit 1
 ---> Running in c7d006c00944
error: build error: The command '/bin/sh -c exit 1' returned a non-zero code: 1

After build error, temporary container remains on the node:

# docker ps -a | grep -v k8s_ | grep Exited
c7d006c00944        1f024693ec8a                                                                                                                       "/bin/sh -c 'exit 1'"    5 minutes ago       Exited (1) 5 minutes ago                       silly_kare