Point ArtifactsTests to custom maven repo dir to avoid stale artifacts

^KTI-1345

libraries/tools/kotlin-bom/pom.xml

@@ -50,6 +50,8 @@
         neither it is visible in the consumer project.
         -->
         <kotlin.version>${project.version}</kotlin.version>
+        <deploy-snapshot-url>sonatype-nexus-staging</deploy-snapshot-url>
+        <deploy-snapshot-repo>https://oss.sonatype.org/content/repositories/snapshots/</deploy-snapshot-repo>
     </properties>
 
     <dependencyManagement>
@@ -186,8 +188,8 @@
             <url>${deploy-url}</url>
         </repository>
         <snapshotRepository>
-            <id>sonatype-nexus-staging</id>
-            <url>https://oss.sonatype.org/content/repositories/snapshots/</url>
+            <id>${deploy-snapshot-repo}</id>
+            <url>${deploy-snapshot-url}</url>
         </snapshotRepository>
     </distributionManagement>