[cle-release-team] New LTI for 2.9.3

[Charles Severance]

I have a few things I would like to get into 2.9.3 for LTI

A few bugs to cleanup.

BLTI-237
Make it so you can specify URL as non-final, key and secret as final and not see XML Paste drop-down

BLTI-238
Make it so that "NOT NULL" constraints in FOORM-controlled tables are removed

BLTI-239
The LTI tool_consumer_info_product_family_code is incorrect on LTI launches

BLTI-240
The allowoutcomes cannot be set to final in a tool registration

BLTI-241
Placement Secret is not Set for Pre-defined LTI Tools

Let me know if any of this raises a concern.

/Chuck