Publish echoheader image

[aledbf]

This PR updates the echoheaders image to 1.5 adding information about the POD (if the env section is configured) and improves the output

$ kubectl exec echoheaders-cgrxv curl localhost:8080

Hostname: echoheaders-cgrxv

Pod Information:
	node name:	 minikube
	pod name:	 echoheaders-cgrxv
	pod namespace:	 default
	pod IP:  	 172.17.0.8

Server values:
	server_version=nginx: 1.13.0 - lua: 10008

Request Information:
	client_address=127.0.0.1
	method=GET
	real path=/
	query=
	request_version=1.1
	request_uri=http://localhost:8080/

Request Headers:
	accept=*/*
	host=localhost:8080
	user-agent=curl/7.47.0

Request Body:
	-no body in request-

[k8s-reviewable]

This change is 

[aledbf]

@nicksardo this image was removed in the migration from contrib.

Please review and if is ok, please merge and publish the image.

[coveralls]

Changes Unknown when pulling ade2f49 on aledbf:echoheaders into ** on kubernetes:master**.

[coveralls]

Coverage increased (+0.03%) to 46.589% when pulling ade2f49 on aledbf:echoheaders into 3a9e3fd on kubernetes:master.

[nicksardo]

Should we change this to a Deployment?

[aledbf]

done

[nicksardo]

Can you bump this to 2017, please?

[aledbf]

done

[aledbf]

@nicksardo thanks!

[coveralls]

Coverage increased (+0.02%) to 46.465% when pulling c18c8f7 on aledbf:echoheaders into 3f0307a on kubernetes:master.