spec: once-ler spec/controllers/[d-e]*

reduce runtime ~50% (2:16 -> 1:06)

Change-Id: I7fae1628f8d9f726bcd0ac6b94f170682e0a9394
Reviewed-on: https://gerrit.instructure.com/38666
Tested-by: Jenkins <jenkins@instructure.com>
Reviewed-by: Landon Wilkins <lwilkins@instructure.com>
Product-Review: Jon Jensen <jon@instructure.com>
QA-Review: Jon Jensen <jon@instructure.com>