Cirros boot failed

Several SSH connection related failure, actually happens
because the VM does not booted properly.

On several connection failure, the tempest also collects the,
console log of the server, and in this case it ends with a similar
message.

[    1.096067] ftrace: allocating 27027 entries in 106 pages
[    1.140070] ..TIMER: vector=0x30 apic1=0 pin1=2 apic2=-1 pin2=-1
[    1.148071] ..MP-BIOS bug: 8254 timer not connected to IO-APIC
[    1.148071] ...trying to set up timer (IRQ0) through the 8259A ...
[    1.148071] ..... (found apic 0 pin 2) ...
[    1.152071] ....... failed.
[    1.152071] ...trying to set up timer as Virtual Wire IRQ...

Change-Id: Ic17c865af4658be72f4c6b0d0c2420f45caa05b3
Related-Bug: #1312199
Merge "Cirros boot failed"