Add tests for object id inline functions

[skliper]

Is your feature request related to a problem? Please describe.
OS_ObjectIdToInteger, OS_ObjectIdFromInteger, OS_ObjectIdEqual, OS_ObjectIdDefined are missing tests.

Describe the solution you'd like
Add tests.

Since these are inline they can be completely exercised via explicit coverage tests (suggest adding to coveragetest-idmap.c).

Note these can be trivial, just need to convert a to and from a range of ID's (note these are just to/from integers, NOT indexes...), check each for equal to itself but not equal to the others, check that OS_OBJECT_ID_UNDEFINED results in undefined and the rest are defined. This also ensures an ID didn't "wrap" by exercising Array Index conversions from array index 0 and max for each type (as defined in configuration).

Describe alternatives you've considered
Could be added to a "functional/full stack" test but no point since they don't have any external dependencies.

Additional context
None

Requester Info
Jacob Hageman - NASA/GSFC

[skliper]

Initial brainstorming thoughts:
Create an array of ID's with two entries for each valid type, use the FromArrayIndex API to create them using 0 and the configured maximum, check that they all return true for OS_ObjectIdIsDefined, confirm OS_OBJECT_ID_UNDEFINED returns false. Create a second array, and use OS_ObjectIdToInteger and OS_ObjectIdFromInteger to fill in the values using the initial set. Then do a double loop (i, j) through the values, comparing the first array to the second and only when i = j should OS_ObjectIdEqual be true

I think that would cover it...

EDIT: Whoops, there may not be a FromArrayIndex... may just need to create all the ID's (seems like overkill, but I'm not sure how else to get the max. Maybe there is a coverage test utility to do the conversion? Could just keep creating them until it errors, then check the max (converted) index against the maximum configured value.