[Alarms]: Added new alarm code for state estimation. This gives specific
feedback about a state estimation failure.
[Alarms]: Changes requested in review

1.) Fix spacing in UAVObject XML file.
2.) Fix missing break;.
3.) Resolved ambiguity possible due to short-circuiting of
if() statement.
Merge pull request #884 from kubark42/attitude-system-alarm-code

Added new alarm code for state estimation.