All of these structs are public. Previously when they were used, they'd
look like the following:
- `consul.ConsulDiscoveryService`
- `etcd.EtcdDiscoveryService`
- `file.FileDiscoveryService`
- `nodes.NodesDiscoveryService`
- `token.TokenDiscoveryService`
- `zookeeper.ZkDiscoveryService`
As a result, they stuttered when read. This commit removes the
duplication of the package names on the struct so that they read better.
See also: https://golang.org/ref/spec#Import_declarations
Signed-off-by: Kushal Pisavadia <kushi.p@gmail.com>
Alexandre Beslic
Andrea Luzzardi
Kushal Pisavadia
Chanwit Kaewkasi
Victor Vieux