Update the OpenVZ kernel

[Metallion]

Problem

Currently Wakame-vdc requires an old OpenVZ version. (042stab055.16)

While the website says that its end of life isn't until November 2019, it has already been removed from the OpenVZ repositories and we are currently hosting our own mirror.

It would be much more preferable to update to the latest version instead.

Solution

Update to the latest version. To do this we will need to update Wakame-vdc's OpenVZ driver since I've been told several vzctl command options have changed.

Remarks

When I attempted an update without applying changes to the driver (#734) this was the result on the CI.

✅ vz.1box
✅ vz.t12-integration-rw
✅ vz.t13-integration-rwx
❌ vz.t21-acceptance-1shot

I investigated the 1shot failure in detail and it looks like restarting the instance failed.

16:20:39 Running ./t.instance.lifecycle.reboot-icmp.sh
--snip--
16:20:55 test_get_instance_ipaddr
16:20:56 test_reboot_instance
16:20:56 ---
16:20:56 - i-ow05lt2o
16:20:56 test_wait_for_network_not_to_be_ready_after_rebooting
16:20:56 PING 10.0.2.100 (10.0.2.100) 56(84) bytes of data.
16:20:56 64 bytes from 10.0.2.100: icmp_seq=1 ttl=64 time=1.08 ms
16:20:56 
16:20:56 --- 10.0.2.100 ping statistics ---
16:20:56 1 packets transmitted, 1 received, 0% packet loss, time 0ms
16:20:56 rtt min/avg/max/mdev = 1.082/1.082/1.082/0.000 ms
16:20:59 [2015-09-29T16:20:59 #29618] time:1 eval:
16:21:02 PING 10.0.2.100 (10.0.2.100) 56(84) bytes of data.
16:21:02 
16:21:02 --- 10.0.2.100 ping statistics ---
16:21:02 1 packets transmitted, 0 received, 100% packet loss, time 0ms
16:21:02 
16:21:02 test_wait_for_sshd_not_to_be_ready_after_rebooting
16:21:06 [2015-09-29T16:21:06 #29618] time:1 eval:
16:21:09 [2015-09-29T16:21:09 #29618] time:2 eval:
--snip--
16:22:59 [2015-09-29T16:22:59 #29618] time:38 eval:
16:23:02 [2015-09-29T16:23:02 #29618] time:39 eval:
16:23:05 Retry Failure: Exceed 120 sec: Retried 40 times
16:23:05 ASSERT:expected:<0> but was:<1>