(fwRenderOgre): Courier.ttf is not allowed for redistribution

What does this MR do?

The font Courier.ttf was removed from fwRenderOgre and replaced by DejaVuSans.ttf, which was already present in the bundle material. Courier.ttf was only used for the unit-tests, so the test was modified to reflect this change.

How to test it?

From a clean build (to be sure that previous resources are still not present):

• Launch fwRenderOgreTest
• Launch OgreViewer and check that OSD text are displayed (top left corner)

Associated Issues/Merge Requests

• Issues
  • Closes #357 (closed)