[config_tool] Duplicate VM name

Added check and error prompt for duplicate names of VM
before save scenario.
Tracked-On: projectacrn#7486
Signed-off-by: Ziheng Li <ziheng.li@intel.com>

misc/config_tools/configurator/packages/configurator/src/pages/Config.vue

@@ -308,7 +308,26 @@ export default {
         vmConfig['@id'] = vmIndex
       })
     },
+    confirmVmName() {
+      let vmNameArr = []
+      let errorFlag = false
+      for (let i = 0; i < this.scenario.vm.length; i++) {
+        vmNameArr.push(this.scenario.vm[i].name)
+      }
+      vmNameArr.sort()
+      console.log(vmNameArr)
+      for (let i = 0; i < vmNameArr.length - 1; i++) {
+        if (vmNameArr[i] === vmNameArr[i + 1]) {
+          alert("There are duplicate VM name with" + vmNameArr[i]
+              + ",\n please your VM name");
+          errorFlag = true
+        }
+      }
+      return errorFlag
+    },
     saveScenario() {
+      let errorFlag = false
+      errorFlag = this.confirmVmName()
       this.assignVMID()
       let msg = ["Scenario xml saved\n",
         ".xml settings validated\n",
@@ -332,6 +351,7 @@ export default {
       this.updateCurrentFormData()
       // get scenario XML with defaults
       scenarioXMLData = scenarioWithDefault.xml
+      if (!errorFlag) {
         // begin write down and verify
         configurator.writeFile(this.WorkingFolder + 'scenario.xml', scenarioXMLData)
             .then(() => {
@@ -359,6 +379,7 @@ export default {
             })
       }
     }
+  }
 }
 </script>