Fix #559, Rename set force fail

[zanzaben]

Describe the contribution
Fixes #559 by changing UT_SetForceFail to UT_SetDefaultReturnValue

Testing performed
Build and run unit test

Expected behavior changes
No impact to behavior

System(s) tested on
Ubuntu 20.04

Additional context

Contributor Info - All information REQUIRED for consideration of pull request
Alex Campbell - NASA/GSFC

[skliper]

Recommending a ticket to change UT_ClearForceFail to UT_ClearDefaultReturnValue.

[jphickey]

I'd also recommend instead of using a simple #define for backward compatibility - make it an inline function e.g.:

static inline void UT_SetForceFail(UT_EntryKey_t FuncKey, int32 Value)
{
    UT_SetDefaultReturnValue(FuncKey, Value);
}

If nothing else this just makes it more like the patterns used elsewhere. The whole thing can go into a #ifndef OSAL_OMIT_DEPRECATED block.

[skliper]

I recommend avoiding merging main into a feature branch. Preference is to rebase the feature on main. You can always do a soft reset and recommit to fix this.