优化Script功能模块的一些结构问题

liteflow-script-plugin/liteflow-script-groovy/src/main/java/com/yomahub/liteflow/script/groovy/GroovyScriptExecutor.java

@@ -52,7 +52,7 @@ public class GroovyScriptExecutor implements ScriptExecutor {
         try{
             if (!compiledScriptMap.containsKey(nodeId)){
                 String errorMsg = StrUtil.format("script for node[{}] is not loaded", nodeId);
-                throw new RuntimeException(errorMsg);
+                throw new ScriptLoadException(errorMsg);
             }
 
             CompiledScript compiledScript = compiledScriptMap.get(nodeId);