provider/consul: Fixing test harness
provider/consul: Change keyword to key from keys
provider/consul: Fixing test DC
provider/consul: Disambiguate between set/get
helper/schema: test case for boolean diffs
providers/consul: fix delete diff
helper/schema: diffing maps that are computed should not result in
change
helper/schema: sets properly take into account the diff
Merge pull request #480 from hashicorp/f-fix-consul

Consul param should be "key"