Use waitGroup to synchronize org creation
Use waitGroup to synchronize org creation

Login integration tests need to create a lot of orgs, which can be done
in parallel, but this process was intermittently timing out. Using a
waitGroup with "defer" should make the process deterministically exit.

[#163960012]

Signed-off-by: Tom Viehman <ef9e7682e71c138189ac51545830b782ff2b8b7d@pivotal.io>

cloudfoundry/cli,cloudfoundry/cli,cloudfoundry/cli