change default to empty
change default to empty

[Finished #131690039]

Signed-off-by: Anand Gaitonde <4f0ff06b2390eeadb0769d298cbdb3dc6df4c73d@pivotal.io>

simonleung8/cli,fujitsu-cf/cli,simonleung8/cli,simonleung8/cli,fujitsu-cf/cli,fujitsu-cf/cli