Build and run existing ECI unit tests under CFE 6.6

[BaldBeacon]

Since the cFE 6.6 removed the for_build directory in it's cmake build system, we are kind of lost on how to add unit tests for the cFS 6.6 apps using UT assert. Effort needs to be made to figure out what unit test looks like for ECI 6.6 and document it accordingly.

[SpaceSteve121]

@BaldBeacon Should this be an issue for the CFS repo? I think its beyond the scope of ECI to define and/or document how to do unit testing in CFS 6.6.

Obviously we want access to that information, which is why I think we should probably open an issue on their repo and ask them to provide it.

[BaldBeacon]

I've opened nasa/cFS#4 on the cFS repository to address this but ultimately we need to propagate those changes to the ECI (via documentation). I expect we should have some section explaining extra steps (if any) to get UT tests working with ECI apps, hence the separate issue.

[SpaceSteve121]

Ok, after that additional bit of explanation I think we're on the same page, I just think the title of this issue is overly broad. I don't think that its ECI's responsibility to document CFE 6.6's UT system in general, which is what the issue title is proposing.

I'd propose changing the title of this issue to Build and run existing ECI unit tests under CFE6.6 and we'll make sure to note any steps which need to be taken (beyond the documentation CFS eventually provides) to run tests for apps based on ECI.

[BaldBeacon]

I can agree with that.