OpenShiftAssistant : add a scale method with applicationName

[dcdh]

Short description of what this resolves:

I have got a Wildfly Swarm application using jaxrs, and JPA. My application is linked with a PostgreSQL database.

I want to test my application when the database is down (scale defined to 0) to ensure that my rest api will respond as expected (custom json response with custom response code).

However, using OpenShiftAssistant, is not currently possible because the scale method used the last deployed application name.

To run my application I need to run PostgreSQL first and then my Wildfly application to avoid it to crash on startup.

Changes proposed in this pull request:

On this pull request I have added a scale method with applicationName and desired scale parameters on both OpenShiftAssistant and KubernetesAssistant.

I have mutualized some methods like awaitApplicationReadinessOrFail.

Regards,
Damien

Fixes #1052

[dcdh]

About the conflict on KubernetesAssistant
in awaitApplicationReadinessOrFail(final String applicationName) it must be .withName(applicationName).isReady(); because applicationName referds to the method variable and not the class variable.

[lordofthejars]

Thank you so much, LGTM!! Can you resolve the conflict? Then when I get a green from Travis I will merge.

[lordofthejars]

Just resolve the merge conflicts and then I will merge. Thanks :)

[dcdh]

Thanks for accepting this PR. Will you plan a new release soon ?

[lordofthejars]

ASAP we merge it, we can do it.

[dipak-pawar]

Closing this as opened #1056

[dipak-pawar]

Thank you @dcdh for your contribution.