adds additional rubocop rules
adds additional rubocop rules

- we want to allow longer block length in tests (hence the
describe and context ignoring)
- upped our method length a bit since 10 felt way to restrictive.

Signed-off-by: Zachary Gershman <3025e35db44f20e0f186af1fead3044efb259b43@pivotal.io>

barthy1/bosh,barthy1/bosh,barthy1/bosh,barthy1/bosh