Fix go-swagger to work with Go 1.14

[thaJeztah]

relates to #40353

full diff: kolyshkin/go-swagger@5793aa6...5e6cb12

The template used was broken with Go 1.14, which has some stricter
rules, introduced in https://golang.org/cl/206124

root@b5beaed18589:/go/src/github.com/docker/docker# ./hack/generate-swagger-api.sh
2020/02/07 15:12:01 trying to read config from /go/src/github.com/docker/docker/api/swagger-gen.yaml
2020/02/07 15:12:02 rendering 1 templates for model ErrorResponse
2020/02/07 15:12:02 name field ErrorResponse
2020/02/07 15:12:02 package field types
2020/02/07 15:12:02 creating "error_response.go" in "api/types" as definition
model: template: schematype:2:18: executing "schemaType" at <(len .AllOf) gt 0>: can't give argument to non-function len .AllOf

This update includes the fix from kolyshkin/go-swagger#1. Opening this as a separate pull request, so that we can backport this to release branches to prepare them for future Go updates

[thaJeztah]

ping @SamWhited @kolyshkin @AkihiroSuda PTAL 🤗

[SamWhited]

LGTM

[thaJeztah]

bringing this one in

[cpuguy83]

Master tests do not like this.

[2020-02-14T19:58:01.544Z] + docker run --rm -t --privileged -v /home/ubuntu/workspace/moby_master/bundles:/go/src/github.com/docker/docker/bundles -v /home/ubuntu/workspace/moby_master/.git:/go/src/github.com/docker/docker/.git --name docker-pr367 -e DOCKER_EXPERIMENTAL -e DOCKER_GITCOMMIT=b2b80564dbcf6b0643a4c29a405c17bb91840dae -e DOCKER_GRAPHDRIVER -e TEST_FORCE_VALIDATE -e VALIDATE_REPO=https://github.com/moby/moby.git -e VALIDATE_BRANCH= docker:b2b80564dbcf6b0643a4c29a405c17bb91840dae hack/validate/default

[2020-02-14T19:58:02.108Z] 0 adds, 0 deletions; nothing to validate! :)

[2020-02-14T19:58:07.376Z] Congratulations!  Seccomp profile generation is done correctly.

[2020-02-14T19:58:07.376Z] Congratulations!  Packages in "./pkg/..." are safely isolated from internal code.

[2020-02-14T19:58:15.485Z] Congratulations!  The swagger spec at "api/swagger.yaml" is valid against swagger specification 2.0

[2020-02-14T19:58:17.381Z] The result of hack/generate-swagger-api.sh differs

[2020-02-14T19:58:17.381Z] 

[2020-02-14T19:58:17.381Z] diff --git a/api/types/container/container_wait.go b/api/types/container/container_wait.go

[2020-02-14T19:58:17.381Z] index 49e05ae669..c2e69b5b25 100644

[2020-02-14T19:58:17.381Z] --- a/api/types/container/container_wait.go

[2020-02-14T19:58:17.381Z] +++ b/api/types/container/container_wait.go

[2020-02-14T19:58:17.381Z] @@ -6,14 +6,6 @@ package container // import "github.com/docker/docker/api/types/container"

[2020-02-14T19:58:17.381Z]  // See hack/generate-swagger-api.sh

[2020-02-14T19:58:17.381Z]  // ----------------------------------------------------------------------------

[2020-02-14T19:58:17.381Z]  

[2020-02-14T19:58:17.381Z] -// ContainerWaitOKBodyError container waiting error, if any

[2020-02-14T19:58:17.381Z] -// swagger:model ContainerWaitOKBodyError

[2020-02-14T19:58:17.381Z] -type ContainerWaitOKBodyError struct {

[2020-02-14T19:58:17.381Z] -

[2020-02-14T19:58:17.381Z] -	// Details of an error

[2020-02-14T19:58:17.381Z] -	Message string `json:"Message,omitempty"`

[2020-02-14T19:58:17.381Z] -}

[2020-02-14T19:58:17.381Z] -

[2020-02-14T19:58:17.381Z]  // ContainerWaitOKBody OK response to ContainerWait operation

[2020-02-14T19:58:17.381Z]  // swagger:model ContainerWaitOKBody

[2020-02-14T19:58:17.381Z]  type ContainerWaitOKBody struct {

[2020-02-14T19:58:17.381Z] @@ -26,3 +18,11 @@ type ContainerWaitOKBody struct {

[2020-02-14T19:58:17.381Z]  	// Required: true

[2020-02-14T19:58:17.381Z]  	StatusCode int64 `json:"StatusCode"`

[2020-02-14T19:58:17.381Z]  }

[2020-02-14T19:58:17.381Z] +

[2020-02-14T19:58:17.381Z] +// ContainerWaitOKBodyError container waiting error, if any

[2020-02-14T19:58:17.381Z] +// swagger:model ContainerWaitOKBodyError

[2020-02-14T19:58:17.381Z] +type ContainerWaitOKBodyError struct {

[2020-02-14T19:58:17.381Z] +

[2020-02-14T19:58:17.381Z] +	// Details of an error

[2020-02-14T19:58:17.381Z] +	Message string `json:"Message,omitempty"`

[2020-02-14T19:58:17.381Z] +}

[2020-02-14T19:58:17.381Z] 

[2020-02-14T19:58:17.381Z] Please update api/swagger.yaml with any API changes, then 

[2020-02-14T19:58:17.381Z] run hack/generate-swagger-api.sh.

script returned exit code 1

[thaJeztah]

@cpuguy83 that looks like the standard map randomisation problem we already have (#36714 was meant to replace it)