Fix small TtlPIcker2 bug (#17376)

* fix

* add changelog

* wrong file name for changelog

* update from what core responded with re: type duration

changelog/17376.txt

@@ -0,0 +1,3 @@
+```release-note:bug
+ui: Remove default value of 30 to TtlPicker2 if no value is passed in.
+```

ui/app/models/mfa-method.js

@@ -123,6 +123,7 @@ export default class MfaMethod extends Model {
     editType: 'ttl',
     helperTextEnabled: 'How long each generated TOTP is valid.',
     hideToggle: true,
+    defaultValue: 30, // API accepts both an integer as seconds and sting with unit e.g 30 || '30s'
   })
   period;
   @attr('number', {

ui/app/models/pki/pki-role-engine.js

@@ -41,6 +41,7 @@ export default class PkiRoleEngineModel extends Model {
       'Also called the not_before_duration property. Allows certificates to be valid for a certain time period before now. This is useful to correct clock misalignment on various systems when setting up your CA.',
     editType: 'ttl',
     hideToggle: true,
+    defaultValue: '30s', // type in API is duration which accepts both an integer and string e.g. 30 || '30s'
   })
   notBeforeDuration;
 

ui/lib/core/addon/components/ttl-picker2.js

@@ -13,7 +13,7 @@
  * @param helperTextDisabled="Allow tokens to be used indefinitely" {String} - This helper text is shown under the label when the toggle is switched off
  * @param helperTextEnabled="Disable the use of the token after" {String} - This helper text is shown under the label when the toggle is switched on
  * @param description="Longer description about this value, what it does, and why it is useful. Shows up in tooltip next to helpertext"
- * @param time=30 {Number} - The time (in the default units) which will be adjustable by the user of the form
+ * @param time='' {Number} - The time (in the default units) which will be adjustable by the user of the form
  * @param unit="s" {String} - This is the unit key which will show by default on the form. Can be one of `s` (seconds), `m` (minutes), `h` (hours), `d` (days)
  * @param recalculationTimeout=5000 {Number} - This is the time, in milliseconds, that `recalculateSeconds` will be be true after time is updated
  * @param initialValue=null {String} - This is the value set initially (particularly from a string like '30h')
@@ -50,7 +50,7 @@ export default TtlForm.extend({
   helperTextDisabled: 'Allow tokens to be used indefinitely',
   helperTextEnabled: 'Disable the use of the token after',
   description: '',
-  time: 30,
+  time: '', // if defaultValue is NOT set, then do not display a defaultValue.
   unit: 's',
   initialValue: null,
   changeOnInit: false,
@@ -62,6 +62,7 @@ export default TtlForm.extend({
     const enable = this.initialEnabled;
     const changeOnInit = this.changeOnInit;
     // if initial value is unset use params passed in as defaults
+    // and if no defaultValue is passed in display no time
     if (!value && value !== 0) {
       return;
     }