improve the error messages when the user write a failed query

[FusRoman]

The system display a traceback log error for a bad query. In the example below, i forgot the n_alerts parameters for a class search query.
It shoud be better to display a message related to the error of the query. The traceback log can be hard to read for a non experiment user.

[jchate6]

This has been addressed in v1.0.0