First draft of isMatPropRequested() (#3470)
Dummy #000
Merge pull request #3478 from dschwen/proptrack_3470

Expose information on whether a material property has been requested.
Merge commit 'ccc7719bdb17ce6c6fc6d9e4fb6fd531b5e0f723'
Merge commit 'b833097097aea69426a4bfa5d76e72db8a84fb0a'