chore: unbreak CodeNarc by providing a correct Groovy version

Previously it were failing with
Could not find artifact org.codehaus.groovy:groovy-all:jar:2.5.13 in google-maven-central

Correction for e9eb623 commit.

Fix #1478

Author: php-coder

Diff for: pom.xml

@@ -1041,7 +1041,7 @@
 				<version>${codenarc.plugin.version}</version>
 				<configuration>
 					<codeNarcVersion>${codenarc.version}</codeNarcVersion>
-					<groovyVersion>${groovy.version}</groovyVersion>
+					<groovyVersion>${groovy-old.version}</groovyVersion>
 					<sourceDirectory>src/test/groovy</sourceDirectory>
 					<!--
 						rulesets/enhanced.xml was excluded because of a lot of errors about failed