message: add assertion to gaia connection unittest
diff: @@ -8,7 +8,7 @@ import { uploadToGaiaHub, getFullReadUrl,
  import { getFile, encryptContent, decryptContent } from '../../../lib/storage'
  import { BLOCKSTACK_STORAGE_LABEL } from '../../../lib/auth/authConstants'
  import { getPublicKeyFromPrivate } from '../../../lib/keys'
  -import { TokenVerifier } from 'jsontokens'
  +import { TokenVerifier, decodeToken } from 'jsontokens'
  class LocalStorage {
  constructor() {
  @@ -693,7 +693,7 @@ export function runStorageTests() {
  })
  test('connectToGaiaHub', (t) => {
  - t.plan(5)
  + t.plan(6)
  const hubServer = 'hub.testblockstack.org'
  @@ -716,10 +716,12 @@ export function runStorageTests() {
  t.equal(hubInfo.read_url_prefix, config.url_prefix)
  t.equal(address, config.address)
  t.equal(hubServer, config.server)
  + const jsonTokenPart = config.token.slice('v1:'.length)
  const verified = new TokenVerifier('ES256K', publicKey)
  - .verify(config.token.slice('v1:'.length))
  + .verify(jsonTokenPart)
  t.ok(verified, 'Verified token')
  + t.equal(hubServer, decodeToken(jsonTokenPart).payload.hubUrl, 'Intended hubUrl')
  })
  })
  