added constant Version so on the next upgrade this only needs to be updated in one location

Former-commit-id: 2131a7bae9cc75f7d7d727f0ed191f6d90d426d2

dependency-check-core/src/main/java/org/owasp/dependencycheck/data/lucene/LuceneUtils.java

@@ -18,6 +18,8 @@
  */
 package org.owasp.dependencycheck.data.lucene;
 
+import org.apache.lucene.util.Version;
+
 /**
  * <p>Lucene utils is a set of utilize written to make constructing Lucene
  * queries simpler.</p>
@@ -26,6 +28,12 @@ package org.owasp.dependencycheck.data.lucene;
  */
 public final class LuceneUtils {
 
+    /**
+     * The current version of Lucene being used. Declaring this one place so an
+     * upgrade doesn't require hunting through the code base.
+     */
+    public final static Version CURRENT_VERSION = Version.LUCENE_45;
+
     /**
      * Private constructor as this is a utility class.
      */