Fix race condition in test
Fix race condition in test

Do not rely on sleeping and get around pruning endpoints by
re-registering them in the eventually loop

[#121903007]

Signed-off-by: Edwin Xie <6bc24e9c160281972837d9e13287696d26612564@pivotal.io>

dramich/cf-bigip-ctlr,ryan-talley/cf-bigip-ctlr,ryan-talley/cf-bigip-ctlr,ryan-talley/cf-bigip-ctlr,dramich/cf-bigip-ctlr,dramich/cf-bigip-ctlr,ryan-talley/cf-bigip-ctlr,dramich/cf-bigip-ctlr