Revert e34870bf3, return to upstream ora2
Merge pull request #3912 from edx/jrbl-edx-west-revert-ora2

Jrbl edx west revert ora2
Merge of PR #3584
   Metrics tab - fix click handlers
   and add download buttons
Revert "Revert e34870bf3, return to upstream ora2"

This reverts commit aa2879be75db2cf1691c731ba45f3254fed869cc.
Temporarily disable capa name masking

There is a bug I need to fix when a student re-visits a problem that they
had solved previously without masking enabled, their old state does not
load correclty.

It's simplest to turn off masking now, and re-enable it with the whole fix.

The change here is a small deletion to remove the masking=True logic, and more
lengthy changes to adjust the tests.