ba0821ed3b
When writing critical state to XML an excpetion can lead to creating a malformed XML that is later parsed and may put the device in a bad state. Hence, on any error while writing we should bail out and drop the partially write state on the floor. Corollary, any error on parsing can lead to having a partially read state that is not consistent which may lead to writing this bad state back to disk. Hence, on any error while parsing we should bail as our current state may be unrecoverable. Change-Id: Ia050c16198cb583f8a51263ad2035dbb948052b8