Fix Framework#datastore specs

MSP-9228

When datastore was deprecated in favor of data_store, the specs were not
updated and so the memoization example was using the wrong instance
variable name.
Fix typo

MSP-9228

Forgot to change method name when changing to class method call.
Fix typo

MSP-9228

Missing 'e' in 'ModuleInfo'.
Fix update_info deprecation

MSP-9228
Fix incorrect syntax for URL reference

MSP-9228
Fix staged payload include order specs

MSP-9228

Synch specs to changes in 4e8b507272541a47ed55f12b05d1ac71f8b2ee0d to
code under test.
Fix datastore deprecation

MSP-9228
Spec myworkspace weirdness

MSP-9228

myworkspace sets @myworkspace, but is not memoized! (It uses = and not
||=).  Changing it to be memoized, as I had done, breaks myworkspace
from changing, but some code only checks the instance variable, so this
weird behavior needs to be documented in specs.
Fix missing rename

MSP-9228