Fix pulling from docker-hub in CI

The docker-hub applies a restrictive pull rate limit based on calling
IP.  Since we cannot predict reuse of IP addresses in CI, using this
repo will flake like crazy.  Rework changes made in
beae564 to use the quay.io registry
instead.

Signed-off-by: Chris Evich <cevich@redhat.com>

tests/conformance/README.md

@@ -20,7 +20,7 @@ First, pull base images used by various conformance tests:
 bash
 docker pull alpine
 docker pull busybox
-docker pull docker.io/library/centos:centos7
+docker pull quay.io/centos/centos:centos7
 ```
 
 Then you can run all of the tests with go test:

tests/conformance/testdata/Dockerfile.reusebase

@@ -1,4 +1,4 @@
-FROM docker.io/library/centos:centos7 AS base
+FROM quay.io/centos/centos:centos7 AS base
 RUN touch -t 201701261659.13 /1
 ENV LOCAL=/1
 

tests/conformance/testdata/Dockerfile.shell

@@ -1,3 +1,3 @@
-FROM docker.io/library/centos:centos7
+FROM quay.io/centos/centos:centos7
 SHELL ["/bin/bash", "-xc"]
 RUN env

tests/conformance/testdata/copy/Dockerfile

@@ -1,3 +1,3 @@
-FROM docker.io/library/centos:centos7
+FROM quay.io/centos/centos:centos7
 COPY script /usr/bin
 RUN ls -al /usr/bin/script

tests/conformance/testdata/copydir/Dockerfile

@@ -1,3 +1,3 @@
-FROM docker.io/library/centos:centos7
+FROM quay.io/centos/centos:centos7
 COPY dir /dir
 RUN ls -al /dir/file

tests/conformance/testdata/copyrename/Dockerfile

@@ -1,3 +1,3 @@
-FROM docker.io/library/centos:centos7
+FROM quay.io/centos/centos:centos7
 COPY file1 /usr/bin/file2
 RUN ls -al /usr/bin/file2 && ! ls -al /usr/bin/file1

tests/conformance/testdata/copysymlink/Dockerfile

@@ -1,2 +1,2 @@
-FROM docker.io/library/centos:centos7
+FROM quay.io/centos/centos:centos7
 COPY file-link.tar.gz /

tests/conformance/testdata/copysymlink/Dockerfile2

@@ -1,7 +1,7 @@
-FROM docker.io/library/centos:centos7
+FROM quay.io/centos/centos:centos7
 COPY file.tar.gz /
 RUN ln -s file.tar.gz file-link.tar.gz
 RUN ls -l /file-link.tar.gz
-FROM docker.io/library/centos:centos7
+FROM quay.io/centos/centos:centos7
 COPY --from=0 /file-link.tar.gz /
 RUN ls -l /file-link.tar.gz

tests/test_buildah_rpm.sh

@@ -12,7 +12,7 @@ load helpers
         skip_if_no_runtime
 
         # Build a container to use for building the binaries.
-        image=docker.io/library/centos:centos7
+        image=quay.io/centos/centos:centos7
         cid=$(buildah from --pull --signature-policy ${TEST_SOURCES}/policy.json $image)
         root=$(buildah mount $cid)
         commit=$(git log --format=%H -n 1)