Update to add logic to disable delete of people in Primary sections 

Summary of changes:
(1) Update the templates to disable delete icon for primary section
(2) Update unit testing
(3) Update urls.py to include sis_section_id as additional parameter to section_details
I reverted changes for _enrollments_list_by_name or _section_classlist templates, but kept the values passed in on Line 22, making it a single boolean, was throwing errors.