fix unit test failure

dubbo-common/src/test/java/com/alibaba/dubbo/common/extensionloader/ExtensionLoader_Adaptive_Test.java

@@ -188,7 +188,7 @@ public class ExtensionLoader_Adaptive_Test {
             ExtensionLoader.getExtensionLoader(NoUrlParamExt.class).getAdaptiveExtension();
             fail();
         } catch (Exception expected) {
-            assertThat(expected.getMessage(), containsString("fail to create adative class for interface "));
+            assertThat(expected.getMessage(), containsString("fail to create adaptive class for interface "));
             assertThat(expected.getMessage(), containsString(": not found url parameter or url attribute in parameters of method "));
         }
     }