Configure debian 8 systems for acceptance tests

* pacemaker and crmsh are delivered in jessie-backports
* openhpid post-install may fail (#408)

spec/spec_helper_acceptance.rb

@@ -35,6 +35,11 @@
 
     hosts.each do |host|
       on host, puppet('module', 'install', 'puppetlabs-stdlib'), acceptable_exit_codes: [0, 1]
+
+      if fact('osfamily') == 'Debian' && fact('operatingsystemmajrelease') == '8'
+        on host, 'echo deb http://ftp.debian.org/debian jessie-backports main >> /etc/apt/sources.list'
+        on host, 'apt-get update && apt-get install -y openhpid'
+      end
     end
   end
 end