CICS SET defect fixes

[mm-broadcom]

How Has This Been Tested?

Ran/adjusted existing tests.

Checklist:

• Each of my commits contains one meaningful change
• I have performed rebase of my branch on top of the development
• I have performed a self-review of my own code
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• I have checked my code and corrected any misspellings

[slavek-kucera]

I am not sure about a lot of these changes.
While they are clearly not diagnosed by the preprocessor, most of them seems to be clearly semantic errors. E.g. why is the user coding SET ENQMODEL(...) and not providing the value that should be set?

EDIT:
Apparently, it is accepted even in runtime with 0 return codes. 🤯