Initial tests

* Add initial tests for config aggregation
* Update AbstractTransformerControllerTest to use the new engine config names

alfresco-transform-libreoffice/alfresco-transform-libreoffice-boot/src/test/java/org/alfresco/transformer/LibreOfficeControllerTest.java

@@ -81,6 +81,9 @@ import org.springframework.test.web.servlet.request.MockMvcRequestBuilders;
 @WebMvcTest(LibreOfficeControllerTest.class)
 public class LibreOfficeControllerTest extends AbstractTransformerControllerTest
 {
+
+    private static final String ENGINE_CONFIG_NAME = "libreoffice_engine_config.json";
+
     @Mock
     private ExecutionResult mockExecutionResult;
 
@@ -137,6 +140,12 @@ public class LibreOfficeControllerTest extends AbstractTransformerControllerTest
         }).when(javaExecutor).convert(any(), any());
     }
 
+    @Override
+    public String getEngineConfigName()
+    {
+        return ENGINE_CONFIG_NAME;
+    }
+
     @Override
     protected void mockTransformCommand(String sourceExtension, String targetExtension,
         String sourceMimetype, boolean readTargetFileBytes)