remove asterisks from API doc generated methods

Method names generated for swagger could include asterisks, and
this would cause syntactically incorrect Ruby code to be generated
in Pandarus as a result.

Test Plan:
- method names generated by "rake api:doc" should not include "*",
  e.g. "resolve_path_courses_full_path" used to have be called
  "resolve_path_courses_*full_path" and should no longer be so.

Fixes SIS-307

Change-Id: I0c618bb9f1589721675766c4d307ff21c816c2fc
Reviewed-on: https://gerrit.instructure.com/35792
Tested-by: Jenkins <jenkins@instructure.com>
Reviewed-by: Eric Adams <eadams@instructure.com>
Product-Review: Eric Adams <eadams@instructure.com>
QA-Review: Jeremy Putnam <jeremyp@instructure.com>