Move default release to 4.18 (#1696)

This is valid for local runs only.

Author: elfosardo

common.sh

@@ -117,7 +117,7 @@ export OPENSHIFT_CLIENT_TOOLS_URL=https://mirror.openshift.com/pub/openshift-v4/
 # Note: when changing defaults for OPENSHIFT_RELEASE_STREAM, make sure to update
 #       doc in config_example.sh
 export OPENSHIFT_RELEASE_TYPE=${OPENSHIFT_RELEASE_TYPE:-nightly}
-export OPENSHIFT_RELEASE_STREAM=${OPENSHIFT_RELEASE_STREAM:-4.17}
+export OPENSHIFT_RELEASE_STREAM=${OPENSHIFT_RELEASE_STREAM:-4.18}
 if [[ "$OPENSHIFT_RELEASE_TYPE" == "ga" ]]; then
     if [[ -z "$OPENSHIFT_VERSION" ]]; then
       error "OPENSHIFT_VERSION is required with OPENSHIFT_RELEASE_TYPE=ga"

config_example.sh

@@ -31,10 +31,10 @@ set -x
 # OPENSHIFT_RELEASE_STREAM -
 # Select a different release stream from which to pull the latest image, if the
 # image name is not specified.
-# Default: 4.17
+# Default: 4.18
 # NOTE: Do not use for arm64, instead override OPENSHIFT_RELEASE_IMAGE
 #
-#export OPENSHIFT_RELEASE_STREAM=4.17
+#export OPENSHIFT_RELEASE_STREAM=4.18
 
 # OPENSHIFT_RELEASE_TYPE -
 # Select a different release type from which to pull the latest image.