[SPARK-2810] upgrade to scala-maven-plugin 3.2.0

Needed for Scala 2.11 compiler-interface

Signed-off-by: Anand Avati <avatiredhat.com>

Author: Anand Avati <avati@redhat.com>

Closes #1711 from avati/SPARK-1812-scala-maven-plugin and squashes the following commits:

9a22fc8 [Anand Avati] SPARK-1812: upgrade to scala-maven-plugin 3.2.0