include runwith in initialized junit classes

Author: diegomarquezp

src/main/resources/META-INF/native-image/com.google.cloud/google-cloud-spanner-jdbc/native-image.properties

@@ -9,4 +9,5 @@ Args = --initialize-at-build-time==com.google.cloud.spanner.IntegrationTestEnv,\
   com.google.spanner.admin.database.v1.DatabaseDialect,\
   com.google.spanner.admin.database.v1.DatabaseDialect$1,\
   org.junit.runners.MethodSorters,\
-  org.junit.runners.Parameterized
+  org.junit.runners.Parameterized,\
+  org.junit.runner.RunWith,\