Install linux-generic-hwe-16.04 on minions

Change-Id: I7cec4a974b6edcfdd2b7baacfcae7a3039bb4184
Reviewed-on: https://review.gerrithub.io/373343
Reviewed-by: Dennis Dmitriev <dis.xcom@gmail.com>
Tested-by: Dennis Dmitriev <dis.xcom@gmail.com>
diff --git a/tcp_tests/templates/physical_mcp11_ovs_dpdk/underlay--user-data.yaml b/tcp_tests/templates/physical_mcp11_ovs_dpdk/underlay--user-data.yaml
index 51e728d..e1646cd 100644
--- a/tcp_tests/templates/physical_mcp11_ovs_dpdk/underlay--user-data.yaml
+++ b/tcp_tests/templates/physical_mcp11_ovs_dpdk/underlay--user-data.yaml
@@ -64,7 +64,7 @@
    # Node is ready, allow SSH access
    #- echo "Allow SSH access ..."
    #- sudo iptables -D INPUT -p tcp --dport 22 -j DROP
-   - update-initramfs -u
+   - apt-get install linux-generic-hwe-16.04 -y
    - reboot
    ########################################################