Regenerate protos with Go 1.10, and make check conditional

Gofmt changed in Go 1.10, so regenerating with the new formatting.
From the Go 1.10 release notes: https://golang.org/doc/go1.10#gofmt

> Gofmt
> ... Second, single-method interface literals written on a single line,
> which are sometimes used in type assertions, are no longer split onto multiple lines.

The travis configuration was updated to skip `check-protos` on Go 1.9

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

api/events/container.pb.go

@@ -158,9 +158,7 @@ func (m *ContainerCreate_Runtime) Field(fieldpath []string) (string, bool) {
 			return "", false
 		}
 
-		adaptor, ok := decoded.(interface {
-			Field([]string) (string, bool)
-		})
+		adaptor, ok := decoded.(interface{ Field([]string) (string, bool) })
 		if !ok {
 			return "", false
 		}

api/services/events/v1/events.pb.go

@@ -115,9 +115,7 @@ func (m *Envelope) Field(fieldpath []string) (string, bool) {
 			return "", false
 		}
 
-		adaptor, ok := decoded.(interface {
-			Field([]string) (string, bool)
-		})
+		adaptor, ok := decoded.(interface{ Field([]string) (string, bool) })
 		if !ok {
 			return "", false
 		}