we allow only nonegative ids

rest-api/src/test/java/lcsb/mapviewer/api/projects/models/parameters/ParametersRestImplTest.java

@@ -29,7 +29,7 @@ public class ParametersRestImplTest extends RestTestFunctions {
   @Test(expected = ObjectNotFoundException.class)
   public void testGetParameterForNonExistingModel() throws Exception {
     parametersRestImpl.getParameter(configurationService.getConfigurationValue(ConfigurationElementType.DEFAULT_MAP),
-        "-1", "-1");
+        "0", "0");
   }
 
   @Test(expected = ObjectNotFoundException.class)