packages: temporarily disable Systemd support on RedHat-distros

SELinux prevents us from using our default port 14195
 -> either change default to be in ephemeral_port_t range (starting at 32768) or adapt SELinux policy

git-svn-id: https://scalaris.googlecode.com/svn/trunk@7049 71766da9-9752-0410-ab17-bfafa751c56a
packages: fix wrong ruby requires for CentOS/RHEL 7

git-svn-id: https://scalaris.googlecode.com/svn/trunk@7050 71766da9-9752-0410-ab17-bfafa751c56a
gossip_load: dialyzer fixes
gossip_vivaldi_SUITE: cleanup
gitignore: remove redundant entries
dc_clustering: fix dc.yaws
make: add ct-skipped.log to Makefile.in
gossip_vivaldi_SUITE: add update_coordinate test
gossip: replace send_local_after with msg_delay when possible