Merge pull request #420 from awhitford/Issue419

Issue #419 - Avoiding a duplicate CPE Index Created message

dependency-check-core/src/main/java/org/owasp/dependencycheck/analyzer/CPEAnalyzer.java

@@ -134,6 +134,7 @@ public class CPEAnalyzer implements Analyzer {
      * process.
      */
     public void open() throws IOException, DatabaseException {
+        if (!isOpen()) {
             cve = new CveDB();
             cve.open();
             cpe = CpeMemoryIndex.getInstance();
@@ -147,6 +148,7 @@ public class CPEAnalyzer implements Analyzer {
                 throw new DatabaseException(ex);
             }
         }
+    }
 
     /**
      * Closes the data sources.