Assume User Modal is not functional

[rmathew1011]

Describe the bug
Clicking on Assume User option does not open up the modal

To Reproduce
Steps to reproduce the behavior:

1. Go to 'https://labs.library.tamu.edu/cap/'
2. Click on glyphicon dropdown icon followed by Assume User
3. We will not see modal displayed

Reason:
The assumeUserModal.html file is missing and
this code from the index.html
<modal modal-id="assumeUserModal" modal-view="views/modals/assumeUserModal.html" modal-header-class="modal-header-primary" wvr-modal-backdrop="static"></modal>

Expected behavior
A modal should pop up.

Screenshots
n/a.