test(orca-contract): never mind vstorage layer

makeQueryToolMock() was disconnected from the behavior of the contract

 - use vt.when() to resolve the offer result vow
   - test passStyleOf invitationMakers
   - test some details of publicSubscribers
 - use bootstrap powers from boot-tools.js for
   agoricNames, storage, marshaller, zoe, bldIssuerKit, ...
   - use registerChain to add chains to agoricNames
 - prune getChainHub test on cosmosInterchainService
   It has no such method.
 - make cosmosInterchainService, localchain mocks conform to
   production API
 - clean up logging a bit
 - removed test for bad chainName - no need to test this test code