Run mocha without --parallel
Run mocha without --parallel

Invoking mocha without --parallel in test-unit-cov works well in other
projects, but causes the pretest-unit/posttest-unit scripts not to be
run.  Rather than duplicating these (or adding forwarding scripts),
minimize duplication by removing --parallel in test-unit.

Signed-off-by: Kevin Locke <ffb4761cba839470133bee36aeb139f58d7dbaa9@kevinlocke.name>

kevinoid/git-branch-is,kevinoid/git-branch-is,kevinoid/git-branch-is