Datepicker warning when datepicker-options is not supplied

[georules]

Bug description:

When datepicker-options is not supplied, you get the warning "Literal date support has been deprecated, please switch to date object usage."
from here:

bootstrap/src/datepickerPopup/popup.js

Line 209 in fc02fd1

$log.warn('Literal date support has been deprecated, please switch to date object usage');

This was committed recently:
#5732

Link to minimally-working plunker that reproduces the issue:

http://plnkr.co/edit/rk6oFGmgURnzloSmGNLm?p=preview

Click the first popup datepicker and view the console. This problem does not arise if you include datepicker-options with min and max date. This is strange, because it seems that this is checked for here:

bootstrap/src/datepickerPopup/popup.js

Line 203 in 98eb8f1

if (!$scope.datepickerOptions[key]) {

Version of Angular, UIBS, and Bootstrap

Angular:
1.5.3
UIBS:
1.3.1
Bootstrap:
3.3.6

[deeg]

This has already been fixed as part of 98eb8f1 and is a duplicate issue of #5743