Update cloudstack-dhcp

sdk_container/src/third_party/coreos-overlay/coreos-base/oem-cloudstack/files/cloudstack-dhcp

@@ -2,22 +2,20 @@
 
 get_dhcp_ip() {
     local leases_dir="/run/systemd/netif/leases"
+    local found=0
     while true; do
-        if [[ "$(find "${leases_dir}" -type f -size +1c)" ]]; then
+        for leasefile in $(find "${leases_dir}" -type f -size +1c); do
-            break
+            dhcp_server_ip=$(cat $leasefile | awk -F= '/SERVER_ADDRESS/ { print $2 }')
-        fi
+            if [[ -n "${dhcp_server_ip}" ]]; then
+                metadata_url="http://${dhcp_server_ip}/latest/meta-data/"
+                if curl --fail -s "${metadata_url}" >/dev/null; then
+                    echo $dhcp_server_ip
+                    found=1
+                    break
+                fi
+            fi
+        done
+        [[ $found -eq 0 ]] || break
         sleep .5
     done
-
-    for leasefile in "${leases_dir}/"*; do
-        dhcp_server_ip=$(cat $leasefile | awk -F= '/SERVER_ADDRESS/ { print $2 }')
-        if [[ -n "${dhcp_server_ip}" ]]; then
-            metadata_url="http://${dhcp_server_ip}/latest/meta-data/"
-            curl --fail -s "${metadata_url}" >/dev/null
-            if [[ $? -eq 0 ]]; then
-                echo $dhcp_server_ip
-                break
-            fi
-        fi
-    done
 }