Fix a bug that job might not be able to be started properly.

A variable name was mispelled and it could lead to jobs unable to be
started.

Test: Mannual tested.
Change-Id: I4067e2ae243428cb190463f55122b88d471f45f7

tools/otagui/src/services/JobSubmission.js

@@ -35,7 +35,7 @@ export class OTAConfiguration {
    * Start the generation process, will throw an error if not succeed
    */
   async sendForm() {
-    for (let flag of OTAExtraFlags.slice(3, OTAflags.length)) {
+    for (let flag of OTAExtraFlags) {
       if (this[flag.key]) {
         this.extra_keys.push(flag.key)
       }