Defense around not getting parser output.

Bug: 53938

This doesn't stop the bug from occuring but makes it much less painful
when it does.

Also override normalizeText to be a noop because Elasticsearch performs
all required normalization _and_ I'm worried it could cause problems
with this fix.

Change-Id: I343891a491dd2c66a52a35298eba9cc304b3991a
Merge "Defense around not getting parser output."