Force change to force a build
<slf4j.version>1.7.21</slf4j.version>
<!--
Leave spark.version blank. This is always overridden
- by version-specific profiles for CDH, APache, EMR, etc...
+ by version-specific profiles for CDH, Apache, EMR, etc...
-->
<spark.version></spark.version>
<spark.scala.version>2.11</spark.scala.version>
