server/container_create: Simplify command/args join

The old code was needlessly splitting either kubeCommands or kubeArgs
into [0] and [1:].  The new code doesn't bother with that.  From
[1,2], all we need to do is append kubeArgs to kubeCommands, and we
can do that in one line.

[1]: https://docs.docker.com/engine/reference/builder/#understand-how-cmd-and-entrypoint-interact
[2]: https://github.com/opencontainers/image-spec/blob/v1.0.1/conversion.md#verbatim-fields

Signed-off-by: W. Trevor King <wking@tremily.us>

server/container_create.go

@@ -399,18 +399,7 @@ func buildOCIProcessArgs(containerKubeConfig *pb.ContainerConfig, ociConfig *v1.
 		return nil, fmt.Errorf("no command specified")
 	}
 
-	// create entrypoint and args
+	processArgs := append(kubeCommands, kubeArgs...)
-	var entrypoint string
-	var args []string
-	if len(kubeCommands) != 0 {
-		entrypoint = kubeCommands[0]
-		args = append(kubeCommands[1:], kubeArgs...)
-	} else {
-		entrypoint = kubeArgs[0]
-		args = kubeArgs[1:]
-	}
-
-	processArgs := append([]string{entrypoint}, args...)
 
 	logrus.Debugf("OCI process args %v", processArgs)