remove old changelog entries

purge everything older then one year
manifest-async - switch to async job on server for CLI/api manifest import
manifest-async - db:migrate
Use service-wait for elasticsearch in katello-configure

I hit an issue when elasticsearch was not ready for katello db seed.
katello-configure - install and set up foreman-katello-engine

After this change, katello and foreman will be able to communicate
both ways. This means initial support for host groups provisioning
with Katello activation keys.
Merge pull request #1828 from iNecas/katello-configure-foreman-engine

katello-configure - install and set up foreman-katello-engine
Merge pull request #1827 from iNecas/elasticsearch-service-wait

Use service-wait for elasticsearch in katello-configure
add new foreman deps

for el6 right now, f18 will come later
Merge pull request #1824 from thomasmckay/manifest-async

CLI/API async task for manifest import
adding content search models to spec file
Updating language in the README
Merge pull request #1810 from xsuchy/pull-req-old-changelog

remove old changelog entries
yet another round of deps
set a 1 hour expiration on the http session
support for selective (based on url accessed) expiration of cookies
added a comment re: Katello::UrlConstrainedCookieStore#call origins
added comment in session_store initializer pointing to environment-specific initializers instead.
removed a trailing space
moved tests to a more visible spot in the test suite
fixes based on comments in the PR