Fix up test output differences that are caused by the checkin of the complex vector...

Fix up test output differences that are caused by the checkin of the complex vector stuff yesterday. That patch contained the removal of hand unrolled loops and replaced them with straight loops that the compiler can unroll itself (compiler technology has improved in the last 10 years since we wrote that code). This changes the order of addition, which is non-commutative in floating point arithmetic and thereby changed round-off.

git-svn-id: https://svn.dealii.org/trunk@15447 0785d39b-7218-0410-832d-ea1e28bc413d