Make getDefaultMaterialProperty work correctly with block restrictions

[dschwen]

getDefaultMaterialProperty is currently not working correctly when used on multiple blocks. This is due to hasMaterialProperty not being block restricted. Using hasBlockMaterialProperty should fix this. @jasondhales encountered this bug.

Assign to me.

[jasondhales]

Another wrinkle. In the example I showed Daniel, multiple mesh blocks need
the same material for a solid mechanics application. Since this material
is created three times (once for x, once for y, and once for z
displacements), the second two times getDefaultMaterialProperty is called
for a mesh block, it will see that the MatProp has been declared. However,
none of those materials compute the property, and the code errors
out. Any ideas outside of vector variables in MOOSE?

[dschwen]

cfd4468 adds a new test (which fails in current moose) to demonstrate the problem (and to protect us from regressions once it is fixed)