oracle bulk loader fixes #4322 (#4325)

* fix missing connection line. #4322

* fix NPE in SQL statements. #4322

* fix incorrect SQL Loader command. #4322

* oracle docker compose initial version. #4322

* removed oracle docker compose placeholder. #4322

Author: bamaer

plugins/transforms/orabulkloader/src/main/java/org/apache/hop/pipeline/transforms/orabulkloader/OraBulkLoader.java

@@ -438,7 +438,7 @@ public String createCommandLine(OraBulkLoaderMeta meta, boolean password) throws
         databaseName = '"' + databaseName + '"';
       }
 
-      sb.append(databaseName);
+      sb.append("/" + databaseName);
     } else {
       throw new HopException("No connection specified");
     }

plugins/transforms/orabulkloader/src/main/java/org/apache/hop/pipeline/transforms/orabulkloader/OraBulkLoaderDialog.java

@@ -234,7 +234,8 @@ public void widgetSelected(SelectionEvent e) {
         };
 
     // Connection line
-    wConnection = addConnectionLine(shell, wTransformName, input.getConnection(), lsMod);
+    wConnection =
+        addConnectionLine(wBulkLoaderComposite, wTransformName, input.getConnection(), lsMod);
     wConnection.addSelectionListener(lsSelection);
 
     // Schema line...

plugins/transforms/orabulkloader/src/main/java/org/apache/hop/pipeline/transforms/orabulkloader/OraBulkLoaderMeta.java

@@ -546,8 +546,7 @@ public SqlStatement getSqlStatements(
       IHopMetadataProvider metadataProvider)
       throws HopTransformException {
 
-    DatabaseMeta databaseMeta =
-        getParentTransformMeta().getParentPipelineMeta().findDatabase(connection, variables);
+    DatabaseMeta databaseMeta = pipelineMeta.findDatabase(connection, variables);
 
     SqlStatement retval =
         new SqlStatement(transformMeta.getName(), databaseMeta, null); // default: nothing to do!