fix in cmake and change in the cyclic loading test

[shadisharba]

• fix ffast-math option in cmake
• move cyclic_loading test from damage to hypoelastic_plastic
• use absolute errors when no load is applied

[dbeurle]

Failing due to an Eigen bug. Once this is resolved, we'll reference the latest Eigen version instead of tracking head http://eigen.tuxfamily.org/bz/show_bug.cgi?id=1643