Add failed status

[apdibbo]

Add a failed status to the Machines and History page to show if there has been a problem with a VM.
This is triggered by either the FAILED state (7) or the following LCM_STATES:

FAILURE             = 14,
BOOT_FAILURE            = 36,
BOOT_MIGRATE_FAILURE    = 37,
PROLOG_MIGRATE_FAILURE  = 38,
PROLOG_FAILURE          = 39,
EPILOG_FAILURE          = 40,
EPILOG_STOP_FAILURE     = 41,
EPILOG_UNDEPLOY_FAILURE = 42,
PROLOG_MIGRATE_POWEROFF_FAILURE = 44,
PROLOG_MIGRATE_SUSPEND_FAILURE  = 46,
BOOT_UNDEPLOY_FAILURE   = 47,
BOOT_STOPPED_FAILURE    = 48,
PROLOG_RESUME_FAILURE   = 49,
PROLOG_UNDEPLOY_FAILURE = 50,