[SPARK-4639] [SQL] Pass maxIterations in as a parameter in Analyzer

fix a TODO in Analyzer:
// TODO: pass this in as a parameter
val fixedPoint = FixedPoint(100)

Author: Jacky Li <jacky.likun@huawei.com>

Closes #3499 from jackylk/config and squashes the following commits:

4c1252c [Jacky Li] fix scalastyle
820f460 [Jacky Li] pass maxIterations in as a parameter