Update ginkgo and gomega

Signed-off-by: Max Brunsfeld <mbrunsfeld@pivotallabs.com>
Ignore test coverage files

Signed-off-by: Max Brunsfeld <mbrunsfeld@pivotallabs.com>
Don't download etcd and gnatsd in test script

They are not used by this project

Signed-off-by: Max Brunsfeld <mbrunsfeld@pivotallabs.com>