Remove hardcoded default route in cfg01-day01 image

To get actual default route, need to remove the hardcoded one

Change-Id: Iccd87d90712059724af59ecd928cb949681b991e
diff --git a/tcp_tests/templates/cookied-mcp-ocata-dop-sl2/underlay--user-data-cfg01.yaml b/tcp_tests/templates/cookied-mcp-ocata-dop-sl2/underlay--user-data-cfg01.yaml
index 2fcf441..c2b42d3 100644
--- a/tcp_tests/templates/cookied-mcp-ocata-dop-sl2/underlay--user-data-cfg01.yaml
+++ b/tcp_tests/templates/cookied-mcp-ocata-dop-sl2/underlay--user-data-cfg01.yaml
@@ -36,6 +36,7 @@
 
    # Prepare network connection
    - sudo ifdown ens3
+   - sudo ip r d default || true  # remove existing default route to get it from dhcp
    - sudo ifup ens3
    #- sudo route add default gw {gateway} {interface_name}