Column attributes can't be used

[alanbernstein]

For bugs, please provide the following:

What's going wrong?

Column attributes can't be used

What was expected?

Column attributes can be written and read

Steps to reproduce the behavior

curl http://127.0.0.1:10101/index/i/query -d"SetColumnAttrs(1, foo='bar')"

{"results":[null]}

This is the expected response when writing, but the write success/failure isn't obvious.

curl http://127.0.0.1:10101/index/i/query -d"Options(TopN(f), columnAttrs=true)"

or

curl http://127.0.0.1:10101/index/i/query?columnAttrs=true -d"TopN(f)"

{"results":[[{"id":0,"key":"","count":11}]]}

This result should include "columnAttrs" at the top level.