Remove the different job msg types to avoid duplication of code

[maleck13]

Describe what this PR does and why we need it:

There were 3 different JobMsg types being used however they were all essentially the same barring one field and all consumers of the type were using the interface: WorkMsg

Changes proposed in this pull request

• remove the provisionmsg, deprovisionmsg and updatemsg type and replace them with a single jobmsg type

[coveralls]

Changes Unknown when pulling 804e26f on maleck13:condense-job-msgs-into-single-type into ** on openshift:master**.

[maleck13]

While looking into #475 I noticed the different job msg types were all the same and that the specific type was not being used for anything so seemed to make sense to merge them into a single type

[jmrodri]

I think the original idea was to have different types for each of the subscribers, but as you have noticed they were just copies of each other. I'm ok with this change. I'm merging this so I can have this incorporated into my async bind work.