single valued options with "selected=true" fetched from remote URL don't work

[schast]

Issue type: Bug report

My Rundeck detail

• Rundeck version: 2.8.2
• install type: launcher
• OS Name/version: RHEL 7

Actual Behavior
selected=true don't work with single valued options

How to reproduce Behavior
this is not working for single valued options.
i have a job with the following options:

options:
- delimiter: ','
  enforced: true
  multivalued: true
  name: node
  required: true
  values:
  - node01
  - node02
  - node03
- enforced: true
  name: product_devops-testapp
  required: true
  valuesUrl: http://localhost/cgi-bin/tmp.pl?node=${option.node.value}

the url returns the following json objects:

URL: http://localhost/cgi-bin/tmp.pl?node=node01
[
    { "value" : "testapp;00_00_01", "name" : "00_00_01" },
    { "value" : "testapp;00_00_02", "name" : "00_00_02" },
    { "value" : "testapp;00_00_03", "name" : "last installed: 00_00_03", "selected" : true }
]

URL: http://localhost/cgi-bin/tmp.pl?node=node02
[
    { "value" : "testapp;00_00_01", "name" : "00_00_01" },
    { "value" : "testapp;00_00_02", "name" : "last installed: 00_00_02", "selected" : true },
    { "value" : "testapp;00_00_03", "name" : "00_00_03" }
]

URL: http://localhost/cgi-bin/tmp.pl?node=node03
[
    { "value" : "testapp;00_00_31", "name" : "00_00_31" },
    { "value" : "testapp;00_00_32", "name" : "last installed: 00_00_32", "selected" : true },
    { "value" : "testapp;00_00_33", "name" : "00_00_33" }
]

when the first node is selected it works.

when the second node is selected it also works.

when the third node is selected, the first value is displayed. the selected=true value is ignored.

after reloading the value of product_devops-testapp option, it works.

Expected Behavior
when the third node is selected, "last installed: 00_00_32" should be displayed.

related to #2420