Change the image tag for openshift-migration-legacy operator

Author: RichardHoch

_attributes/common-attributes.adoc

@@ -60,6 +60,7 @@ endif::[]
 :mtc-full: Migration Toolkit for Containers
 :mtc-version: 1.8
 :mtc-version-z: 1.8.4
+:mtc-legacy-image: 1.7
 // builds (Valid only in 4.11 and later)
 :builds-v2title: Builds for Red Hat OpenShift
 :builds-v2shortname: OpenShift Builds v2

modules/migration-upgrading-mtc-with-legacy-operator.adoc

@@ -35,8 +35,7 @@ $ podman login registry.redhat.io
 +
 [source,terminal,subs="attributes+"]
 ----
-$ podman cp $(podman create \
-  registry.redhat.io/rhmtc/openshift-migration-legacy-rhel8-operator:v{mtc-version}):/operator.yml ./
+$ podman cp $(podman create registry.redhat.io/rhmtc/openshift-migration-legacy-rhel8-operator:v{mtc-legacy-image}:/operator.yml ./
 ----
 
 . Replace the {mtc-full} Operator by entering the following command:
@@ -71,8 +70,7 @@ $ oc -o yaml -n openshift-migration get deployment/migration-operator | grep ima
 +
 [source,terminal,subs="attributes+"]
 ----
-$ podman cp $(podman create \
-  registry.redhat.io/rhmtc/openshift-migration-legacy-rhel8-operator:v{mtc-version}):/controller.yml ./
+$ podman cp $(podman create registry.redhat.io/rhmtc/openshift-migration-legacy-rhel8-operator:v{mtc-legacy-image}):/operator.yml ./
 ----
 
 . Create the `migration-controller` object by entering the following command: