Switch from the Nashorn engine to Graal.js for executing the the expo…

…rt-site-tree script (#234)

Switch from the Nashorn engine to Graal.js for executing the export-site-tree script

scanners/zap/zap.py

@@ -393,8 +393,6 @@ def _setup_export_site_tree(self):
                 "action": "add",
                 "type": "standalone",
                 "name": "export-site-tree-filename-global-var",
-                # Setting the engine to Oracle Nashorn causes the script to fail because
-                # the engine can't be found when using inline scripts. Not sure why this happens
                 "engine": "ECMAScript : Graal.js",
                 "inline": f"""
                 org.zaproxy.zap.extension.script.ScriptVars.setGlobalVar('siteTreeFileName','{self.SITE_TREE_FILENAME}')
@@ -414,7 +412,7 @@ def _setup_export_site_tree(self):
             "parameters": {
                 "action": "add",
                 "type": "standalone",
-                "engine": "ECMAScript : Oracle Nashorn",
+                "engine": "ECMAScript : Graal.js",
                 "name": "export-site-tree",
                 "file": f"{scripts_dir}/export-site-tree.js",
             },

tests/scanners/zap/test_setup.py

@@ -433,7 +433,7 @@ def test_setup_export_site_tree(test_config, pytestconfig):
 
     assert add_script["parameters"]["name"] == run_script["parameters"]["name"]
     assert add_script["parameters"]["file"] == f"{pytestconfig.rootpath}/scanners/zap/scripts/export-site-tree.js"
-    assert add_script["parameters"]["engine"] == "ECMAScript : Oracle Nashorn"
+    assert add_script["parameters"]["engine"] == "ECMAScript : Graal.js"
 
     assert add_variable_script["parameters"]["name"] == run_variable_script["parameters"]["name"]
     assert add_variable_script["parameters"]["inline"]