Use Eventually().Should(Exit()) instead of Expect(Exit()).To(Equal())
Use Eventually().Should(Exit()) instead of Expect(Exit()).To(Equal())

[complete #121692557]

Signed-off-by: Nick Wei <397a225b6adb51a440bd3821475520403c3e9564@pivotal.io>

hyenaspots/cli,fujitsu-cf/cli,markstgodard/cli,simonleung8/cli,hyenaspots/cli,fujitsu-cf/cli,markstgodard/cli,simonleung8/cli,hyenaspots/cli,markstgodard/cli,simonleung8/cli,markstgodard/cli,fujitsu-cf/cli,hyenaspots/cli