Remove unneeded /var/run/nova/keys from install

At one point /var/run/nova/keys may have been needed but I cannot find
it referenced anywhere else.

This dir won't have any impact on a running system anyway since /var/run
will be a tmpfs mount created a boot.

Change-Id: I550cccb0fb876ef23475014c869789d0a4da6bbe
Merge "Remove unneeded /var/run/nova/keys from install"