make ${_basedir} to replace file separator in Windows system (#229)

diff --git a/test/dubbo-scenario-builder/src/main/java/org/apache/dubbo/scenario/builder/ConfigurationImpl.java b/test/dubbo-scenario-builder/src/main/java/org/apache/dubbo/scenario/builder/ConfigurationImpl.java
index 3ed4cc7..92c9e31 100644
--- a/test/dubbo-scenario-builder/src/main/java/org/apache/dubbo/scenario/builder/ConfigurationImpl.java
+++ b/test/dubbo-scenario-builder/src/main/java/org/apache/dubbo/scenario/builder/ConfigurationImpl.java
@@ -85,6 +85,7 @@
             throw new ConfigureFileNotFoundException();
         }
         this.configBasedir = new File(configureFile).getParentFile().getCanonicalPath();
+        this.configBasedir = this.configBasedir.replace(File.separator, "/");
 
         //set default scenarioHome dir to ${configBasedir}/target
         this.scenarioHome = System.getProperty("scenario.home");