Switch to platform_family to add support for Amazon/Scientific/Oracle Linux
Switch to platform_family to add support for Amazon/Scientific/Oracle Linux

jjoos/memcached,dgivens/memcached,tezz123/memcached,benwtr/memcached,derek-zaguroli/memcached,shanethehat/memcached,mre/memcached,shanethehat/memcached,jagoda/memcached,dgivens/memcached,inokappa/memcached,opscode-cookbooks/memcached,mre/memcached,chef-cookbooks/memcached,chef-cookbooks/memcached,Misfit-Wearables/memcached,baldur/memcached,dastergon/memcached,opscode-cookbooks/memcached,dastergon/memcached,wohali/memcached,ROBLOX/memcached,johntdyer/memcached,mapleoin/cookbook-memcached,opscode-cookbooks/memcached,jjoos/memcached,rackspace-cookbooks/rackspace_memcached,hw-cookbooks/memcached,tezz123/memcached,dastergon/memcached,chef-cookbooks/memcached