Replace underscores to dash in autogenerated urls (docker provider)

[WTFKr0]

Closes #1043

[SantoDE]

Hey @WTFKr0 ,

thank's for your contribution :) Can you rebase your branch please, so it fires off again with travis and stuff?

Thanks :-)

WDYT @vdemeester ?

[vdemeester]

LGTM 🐯

[Russell-IO]

LGTM 👍

[emilevauge]

LGTM
Thanks @WTFKr0

[emilevauge]

@WTFKr0 some tests are failing, could you have a look ?

[WTFKr0]

Don't know what are these errors...
Don't think my code do that :D

----------------------------------------------------------------------
PASS: docker_test.go:128: DockerSuite.TestDockerContainersWithLabels	1.689s
PASS: docker_test.go:164: DockerSuite.TestDockerContainersWithOneMissingLabels	1.717s
PASS: docker_test.go:78: DockerSuite.TestSimpleConfiguration	0.504s
PASS: consul_test.go:399: ConsulSuite.TestCommandStoreConfig	3.556s
ERRO[0026] Datastore sync error: Object lock value: expected 1420e2ba-072f-4e6f-a4e5-8e35963a4c6a, got 2842cf2a-43be-4c70-9a37-1cd4567f5c75, retrying in 253.203223ms 
ERRO[0028] Datastore sync error: Object lock value: expected 4e8bcb9e-08d1-4052-addb-7eeaae6ecf58, got 349e3145-e94a-4e41-8114-3221668c0fa4, retrying in 641.745199ms 
[...]
ERRO[0060] Datastore sync error: Object lock value: expected 1c774173-66b0-44e4-ac27-148cdf0f0666, got c94f37f4-ea07-4baf-919f-1060e2e66f53, retrying in 572.685001ms 
ERRO[0060] Datastore sync error: Object lock value: expected e377c3f7-222f-4e16-b465-e9b032bf79db, got 1c774173-66b0-44e4-ac27-148cdf0f0666, retrying in 356.18893ms 
PASS: consul_test.go:440: ConsulSuite.TestDatastore	39.698s
PASS: consul_test.go:249: ConsulSuite.TestGlobalConfiguration	3.473s
PASS: consul_test.go:126: ConsulSuite.TestNominalConfiguration	4.301s
PASS: consul_test.go:108: ConsulSuite.TestSimpleConfiguration	3.769s

[WTFKr0]

Ok I saw it :

FAIL: docker_test.go:96: DockerSuite.TestDefaultDockerContainers
docker_test.go:117:
    c.Assert(resp.StatusCode, checker.Equals, 200)
... obtained int = 404
... expected int = 200

I look