Add in --network so we can specify gce network at the cmdline.

Bug: 113535553
Test: acloud create --network avd-vpc
acloud create_cf --network avd-vpc
acloud create
acloud create_cf ...
acloud delete
atest acloud_test
Change-Id: I10a867f1acb1e58623ca50d33fb19b7011b6ba1c
2 files changed