Allow failures of builds using MOAB master and develop branches.

[pshriwise]

As I recall, these builds are present to notify us of any changes upstream in MOAB that might break DAGMC builds/tests.

We currently require these to pass in CI, which I think is a little overkill. IMO it's sufficient to require that our builds/tests pass and Docker images publish successfully only for official releases of MOAB. I'm curious if @shimwell may have a need for Docker images using MOAB's develop and master branches?

It's still very useful to have these builds of course, so I'm going to look into allowing failures for these builds but always running them for merges into our develop branch.

[shimwell]

I don't have any specific need for Docker images with develop or master versions of MOAB.

[ahnaf-tahmid-chowdhury]

I think we are ready to close the issue since it has been solved by PR #899

[gonuke]

I agree that this is no longer relevant and can be closed. I'll let @pshriwise confirm....