(maint) Move everything out of el6 and into acceptance/

Originally began this as a harness for testing against el6, but now
using this generically for all acceptance, so we can move it back into
acceptance/ proper and not keep it nested under config.
(maint) Pin acceptance to beaker ~> 1.2
(maint) Script package pipeline submission for Jenkins
(maint) Disable repo_proxy when running solaris acceptance

By pulling this platform specific test into the bootstrap script we can
remove it from the Solaris job scripts in Jenkins.
Merge pull request #2157 from jpartlow/maint/master/restructure-acceptance

Maint/master/restructure acceptance