For current design, we can't do VM restart after VM crash due to RM
not allow. Add new crash-restart property to let RM allow do VM
restart. The crash-restart property will be valid when remove
crash-fatal property.
Change-Id: If9cb90d7bc581465b760a5c780203911a247e341
Signed-off-by: Peng Yang <quic_penyan@quicinc.com>