#182 Remove support for institution name in menu items

[moseshll]

See issue #182. Some items in the menuitems table used to have an __INST__ placeholder so we could put an institution name, e.g., "All __INST__ Stats" expanding to "All Johns Hopkins Stats" for the now-defunct "institutional admin" class of user. This functionality is no longer used or needed.

The four commits, in order:

• Add database fixtures to support adding a tests for the modified routine. They may not all be needed for the tests I wrote, but they will be at some point (as test coverage expands).
• Modify CRMS::MenuItems to remove the __INST__ substitution.
• Tidy CRMS::MenuItems
• Fix for one of the aforementioned database fixtures which had a deprecated column removed as part a separate issue.

Reviewer: may want to run test procedure as spelled out in README. I am more interested in a check on the correctness and tidiness of CRMS::MenuItems which is a very small routine. I'm not happy about its return value (it should be an Object of some kind) but fixing that will be a separate issue to address later.

[mwarin]

It builds & the tests pass. The logic changes are small and neat, and I don't really have anything to say about the DB inserts for testing.

Approve!