Replace libxml2-dev dependency with zlib1g for nokogiri 1.6
nokogiri 1.6.x builds its own libxml2 during the gem installationprocess, so allow it to do that rather than link against the systemlibxml2.
refs #10787 - remove foreman-compute subpackage deps
Refs #10129 - foreman-ec2 must depend on foreman-compute (fog)
Refs #8641 - Add foreman-ec2 and recommend it for install with compute
Introduced foreman-debug subpackage
Revert "Add libncurses-dev to build deps for new curses gem dep"
This reverts commit f64dd698fcbf48f04c43faa49a8dc203146f9dc6.
New trollop gem was released without curses dep
Add libncurses-dev to build deps for new curses gem dep
Add specs for Ubuntu 14.04 LTS (aka trusty tahr)