Added hardening to weak-plane shear.  Fixes #3565
Added tests of hardening for weak-plane shear.  Fixes #3565
Also remove tabs from FiniteStrainWeakPlaneShear.C
Merge pull request #3567 from WilkAndy/wps_hardening_3565

Wps hardening 3565
Merge commit 'a88db78b4e84e8aea41d8b8232f584ada5673b5b'