[Bug] Test Function used in Main Code

[dciborow]

https://github.com/microsoft/SynapseML/blob/0840e318bdba37b93fd39029867edffd466be92b/core/src/main/scala/com/microsoft/azure/synapse/ml/recommendation/SARModel.scala#L87

The "===" is a test function that may be excluded from the package. An alternative approach should be used to avoid issues if the following excludes are used.

.config('spark.jars.excludes', 'org.scala-lang:scala-reflect,org.apache.spark:spark-tags_2.12,org.scalactic:scalactic_2.12,org.scalatest:scalatest_2.12')