Fix incompatible division
Fix incompatible division

While deleting a post, the number of comments are retrieved where API reports wrong number of total pages due to PY3 incompatible division:

response.data["pagination"]
{'previous': None, 'count': 3, 'num_pages': 1.02, 'next': 'http://apros.devstack.lms?ajax=1&page=2'}

Which results in PageNotFoundError:

is_thread)):
  File "/edx/src/discussion-edx-platform-extensions/social_engagement/engagement.py", line 382, in _get_paginated_results
    has_next = response.data["pagination"]["next"]
  File "/edx/app/edxapp/edx-platform/lms/djangoapps/discussion/rest_api/views.py", line 526, in retrieve
    form.cleaned_data["requested_fields"],
  File "/edx/app/edxapp/edx-platform/lms/djangoapps/discussion/rest_api/api.py", line 1074, in get_response_comments
    raise PageNotFoundError("Page not found (No results on this page).")
openedx.core.lib.exceptions.PageNotFoundError: Page not found (No results on this page).
eduNEXT/edunext-platform,eduNEXT/edunext-platform,stvstnfrd/edx-platform,EDUlib/edx-platform,eduNEXT/edunext-platform,edx/edx-platform,edx/edx-platform,eduNEXT/edx-platform,angelapper/edx-platform,eduNEXT/edx-platform,arbrandes/edx-platform,angelapper/edx-platform,edx/edx-platform,arbrandes/edx-platform,stvstnfrd/edx-platform,edx/edx-platform,eduNEXT/edunext-platform,eduNEXT/edx-platform,EDUlib/edx-platform,arbrandes/edx-platform,angelapper/edx-platform,arbrandes/edx-platform,eduNEXT/edx-platform,EDUlib/edx-platform,angelapper/edx-platform,stvstnfrd/edx-platform,stvstnfrd/edx-platform,EDUlib/edx-platform