mlsql-autosuggest unit test fails on spark-3.1.1

[chncaesar]

On Spark-3.1.1-hadoop3.2 , mlsql-autosuggest unit test returns error

ANTLR Tool version 4.7.1 used for code generation does not match the current runtime version 4.8

mlsql uses antlr 4.7.1 while spark3 uses 4.8-1. btw, this works on spark 2.4.x.