Comment 8 for bug 1700548

With https://review.openstack.org/#/c/477313/
gate-ironic-dsvm-standalone-ubuntu-xenial will work.

For gate-grenade-dsvm-ironic-multinode-multitenant-ubuntu-xenial,
there is another issue the that fixed upgrade.sh in networking-generic-switch doesn't run.
It seems caused by overwriting a directory name(GITDIR[networking-generic-switch]) from 'new' to 'old' by enable_plugin here[1] due to naming conflict in Grenade and DevStack.

[1] https://github.com/openstack/ironic/blob/fdf6f89a231870fc230c4b15caf098be34d498f1/devstack/upgrade/settings#L15
[2] https://github.com/openstack-dev/grenade/blob/11dd94308ed5c25a8f28f86b03b20b251f0a05a1/inc/plugin#L163
[3] https://github.com/openstack-dev/devstack/blob/2967ca3dfd0d64970dfa5dfa7ac2330ee7aa90ed/functions-common#L1890