ci: update out of docker image to MCR

Author: jpayne3506

hack/manifests/apache.yaml

@@ -13,6 +13,5 @@ spec:
     spec:
       containers:
       - name: ubuntu-tools
-        image: tamilmani1989/ubuntu18-tools
+        image: acnpublic.azurecr.io/tamilmani1989/ubuntu18-tools
         command: ["/bin/sleep", "3650d"]
-        

hack/manifests/netperf-pod.yaml

@@ -20,7 +20,7 @@ spec:
         netperf: "true"
       containers:
       - name: ubuntu
-        image: tamilmani1989/ubuntu18-tools
+        image: acnpublic.azurecr.io/tamilmani1989/ubuntu18-tools
         imagePullPolicy: Always
         command: ["/bin/sh","-c"]
         args: ["echo helloworld>hello.txt; php -S 0.0.0.0:9568"]