Abaqus mesh reader modifies nodesets when surface sets are present

[jessecarterMOOSE]

hi @roystgnr - got another Abaqus mesh reader bug for you. If you look at the MOOSE examples here, maybe this one in particular, you'll see there are no nodesets, but when you run the example, nodesets are created. Also if you explicitly add some nodesets, the presence of multiple surface sets will modify those nodesets. Doesn't seem like correct behavior.