Change multipath prio from const to alua

Signed-off-by: Jose A. Rivera <jarrpa@redhat.com>

roles/openshift_node/templates/multipath.conf.j2

@@ -8,7 +8,7 @@ devices {
                 path_selector "round-robin 0"
                 failback immediate
                 path_checker "tur"
-                prio "const"
+                prio "alua"
                 no_path_retry 120
                 rr_weight "uniform"
         }