Replace the binary Wsk with REST interface WskRest

[houshengbo]

All the non-CLI related tests should sunset the wsk, and re-implement them with wskrest.

import common.wsk 
val wsk = new Wsk

need to be changed to

import common.rest.WskRest
val wsk = new WskRest

plus there may be changes to the rest of the tests as well, since the response result may have been changed.

[houshengbo]

There are 9 test cases: CloudantHealthFeedTests CloudantAccountActionsTests.scala CloudantBindingTests.scala CloudantDatabaseActionsTests.scala CloudantFeedTests.scala CloudantFeedWebTests.scala CloudantMultiWorkersTests.scala CloudantTriggerPersistencyTest.scala CloudantRedundancyTests