Revert "Upgrade Scala Maven Plugin version from 3.2.2 to latest 4.0.1"

This reverts commit 94392ee

CircleCI uses Maven 3.2.5 and Scala Maven Plugin in version 4.0.1 requires Maven version 3.3.9

Author: gslowikowski

simple/scala-plugin-scala-2.10/pom.xml

@@ -40,7 +40,7 @@ under the License.
         <site.plugin.version>3.7.1</site.plugin.version>
         <surefire.plugin.version>2.22.1</surefire.plugin.version>
 
-        <scala.plugin.version>4.0.1</scala.plugin.version>
+        <scala.plugin.version>3.2.2</scala.plugin.version>
         <scoverage.plugin.version>1.4.0-RC1</scoverage.plugin.version>
     </properties>
 

simple/scala-plugin-scala-2.11/pom.xml

@@ -40,7 +40,7 @@ under the License.
         <site.plugin.version>3.7.1</site.plugin.version>
         <surefire.plugin.version>2.22.1</surefire.plugin.version>
 
-        <scala.plugin.version>4.0.1</scala.plugin.version>
+        <scala.plugin.version>3.2.2</scala.plugin.version>
         <scoverage.plugin.version>1.4.0-RC1</scoverage.plugin.version>
     </properties>
 

simple/scala-plugin-scala-2.12/pom.xml

@@ -40,7 +40,7 @@ under the License.
         <site.plugin.version>3.7.1</site.plugin.version>
         <surefire.plugin.version>2.22.1</surefire.plugin.version>
 
-        <scala.plugin.version>4.0.1</scala.plugin.version>
+        <scala.plugin.version>3.2.2</scala.plugin.version>
         <scoverage.plugin.version>1.4.0-RC1</scoverage.plugin.version>
     </properties>