Updated dockerfile to deploy on top of jboss/wildfly (8.2.0.Final)

I have updated your Dockerfile to layer on top of jboss/wildfly, as less downloads will be needed to people using jboss/wildfly for anything else).

I have modified the CMD to expose also management interface on 0.0.0.0 and added a user (You can remove this step if you think it is a security contraint, but for now I think it can be ok).

As the distribution zip file assumes to be layered on top of wildfly-8.1.0.Final y have to copy the files to wildfly (it is 8.2.0.Final). Options here for next iteration is to not put it into a dir, or use wildfly as dir, to make it more generic, as I assume it works in wildfly 8.1 as well as 8.2 (at least in my very few tests).

Also, as a side note, the instructions for http://www.apiman.io/latest/download.html use old apiman-dt-ui and not apiman-management.