Don't hit metrics endpoint for liveness

We are hitting the metrics point often which can cause load on teh
system, this patch makes changes so we just hit the root instead.

Change-Id: Ifda7ab9dbd5a9513a044ed7988131eb54af5662b

openstack_operator/templates/mcrouter/deployment.yml.j2

@@ -66,11 +66,11 @@ spec:
           containerPort: 9442
         livenessProbe:
           httpGet:
-            path: /metrics
+            path: /
             port: metrics
         readinessProbe:
           httpGet:
-            path: /metrics
+            path: /
             port: metrics
         resources:
           limits:

openstack_operator/templates/memcached/deployment.yml.j2

@@ -62,11 +62,11 @@ spec:
           containerPort: 9150
         livenessProbe:
           httpGet:
-            path: /metrics
+            path: /
             port: metrics
         readinessProbe:
           httpGet:
-            path: /metrics
+            path: /
             port: metrics
         resources:
           limits: