Fix for Dirac off-diagonal Jacobian entries.

This is a quick fix for three tests that crash in debug mode so that we
can keep the build page running, I am working on trying to track down
the root cause of the issue.

Refs #668.
Merge pull request #3442 from jwpeterson/fixup_dirac_offdiag

Fix for Dirac off-diagonal Jacobian entries.
Resize props as needed during initStatefulProps
Run only aux kernels of the same type when computing user objects
refs #2172
Reiniting materials when computing aux kernels is optional
Legacy flag added to toggle behavior for each failing test
Fixing tests:

- Fixing input files (need to do gold files)
- Fixing stateful_prop_test_older
- Fixing constant scalar sux test
- Updating material_test
- Fixing stateful_prop test
- Fixing test/tests/materials/stateful_prop/gold/out_older.csv
- Fixing named_entities test
- Fixing out-of-array access in MaterialPropertyUserObject
- Fixing steteful_prop.test_csv