Change commons-io scope from compile to test.

Author: HappyHacker123

opengrok-indexer/pom.xml

@@ -61,6 +61,7 @@ Portions Copyright (c) 2020-2020, Lubos Kosco <[email protected]>.
             <groupId>commons-io</groupId>
             <artifactId>commons-io</artifactId>
             <version>${commons-io.version}</version>
+            <scope>test</scope>
         </dependency>
         <dependency>
             <groupId>org.apache.lucene</groupId>