Wrap test code objid in ints.

[wmwv]

Numpy >=1.12 disallows float indexing.

@danielsf I've wrapped indexes in these test cases here, and the tests now pass.

But the real question is that given that the index used a lookup of the 'objid' column in the database, what other code in sims_catalogs or users of sims_catalogs have this indexing issue?

[danielsf]

Thanks for fixing this.

I think we should be safe against this failure spreading. As you say, line['id'] refers to the id column in the database. We don't usually index on that column, except in unit tests. I am also reasonably confident that the test coverage in sims_catalogs is good enough that, if this were a problem, we would have seen it in other unit tests than the one you are fixing.