Add agent systemd support
redhat-lsb is not needed for the agent systemd script

This package pulls in everything and the kitchen sink and you really
don't want it on your server if you can avoid it. The RedHat SysVinit
script should also be rewritten to use the RedHat functions instead of
the LSB ones like the EPEL package does but I lack the time.
Merge branch 'home_permissions' into yakara
Merge branch 'systemd_agent' into yakara
Merge branch 'systemd_server' into yakara
Merge branch 'database_dependencies' into yakara
Fix the database dependencies

 - Don't include MySQL recipes when not using MySQL.
 - Don't include mysql::client at all, database::mysql is sufficient.
 - Do include database::postgresql when using PostgreSQL.
 - Bump database dependency due to breaking changes in mysql-chef_gem.
 - Demote mysql and postgresql cookbooks to "suggests" as they are not
   strictly required.
Merge branch 'database_dependencies' into yakara