Pull queries to use same output table format as push

[big-andy-coates]

Pull and push queries use different logic for handling headers. Would be good to combine.

Currently output looks like:

-- Push query:
SELECT * FROM FOO EMIT CHANGES;
+---------------+-------+-------+
|ROWTIME        |ROWKEY |COUNT  |
+---------------+-------+-------+
|1571769443063  |42     |1      |
|1571769543463  |42     |1      |

-- Pull query:
SELECT * FROM FOO WHERE ROWKEY='42';
 ROWKEY STRING KEY | COUNT BIGINT 
 42                | 2   

The output from push queries is much nicer - lets go with that.

cc. @agavra who might fancy picking this up ;)

[big-andy-coates]

This has been resolved by moving pull queries to the /query endpint