Rename crys_num to op_num and crys_index to op_index (#3872)
Oops wrong one
refs #1777
Merge pull request #3883 from permcody/fix_em_warnings

Oops wrong one
Merge pull request #3873 from dschwen/opnum_3872

Rename crys_num to op_num and crys_index to op_index
Merge commit 'aa2aa53747469e3b88c238db3e71177bd19eab0b'