test: fix various routes tests

* system/disks routes is gone
* provision routes now return 405 instead of 409 when re-setup/re-activated

src/tasks.js

@@ -115,9 +115,8 @@ async function update(id, task) {
 
     debug(`update ${id}: ${JSON.stringify(task)}`);
 
-    let args = [ ];
-    let fields = [ ];
-    for (let k in task) {
+    const args = [], fields = [];
+    for (const k in task) {
         if (k === 'result' || k === 'error') {
             fields.push(`${k}Json = ?`);
             args.push(JSON.stringify(task[k]));
@@ -244,7 +243,7 @@ async function listByTypePaged(type, page, perPage) {
     assert.strictEqual(typeof page, 'number');
     assert.strictEqual(typeof perPage, 'number');
 
-    let data = [];
+    const data = [];
     let query = `SELECT ${TASKS_FIELDS} FROM tasks`;
 
     if (type) {