Allow skipping version conflict check via system property

When opensearch.hadoop.version.check.skip system property is set to
"true", the multiple JAR detection in Version.java is bypassed. This
allows users on managed platforms (e.g. AWS Glue) to override a
bundled older version of the connector that cannot be removed from
the classpath.

Signed-off-by: Sotaro Hikita <bering1814@gmail.com>

Author: lawofcycles

mr/src/main/java/org/opensearch/hadoop/util/Version.java

@@ -104,7 +104,7 @@ public abstract class Version {
                         sb.append("\n");
                     }
                 }
-                if (foundJars > 1) {
+                if (foundJars > 1 && !"true".equals(System.getProperty("opensearch.hadoop.version.check.skip"))) {
                     throw new RuntimeException(sb.toString());
                 }
             }