Use acceptance BOSH public IP instead of private IP
Use acceptance BOSH public IP instead of private IP

The BOSH client is now on GCP.

Remove associate-elastic-ip task because vagrant does this.

[finishes #131418287]

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

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