Remove Mako dependency caused by RawDescriptor

Description

The usage of RawDescriptor as the default_class in many places in the modulestore brings in an unwanted and unnecessary Mako dependency.

A/C:

Steps to Reproduce

None

Current Behavior

None

Expected Behavior

None

Reason for Variance

None

Release Notes

None

User Impact Summary

None

Status

Assignee

Brian Mesick

Reporter

Julia Eskew

Reach

None

Impact

None

Platform Area

None

Customer

None

Partner Manager

None

URL

None

Contributor Name

None

Groups with Read-Only Access

None

Actual Points

None

Category of Work

None

Platform Map Area (Levels 1 & 2)

None

Platform Map Area (Levels 3 & 4)

None

Sprint

None

Priority

Unset
Configure