fixed apache group for SUSE/SLES Systems (checked for SLES11/12)

[pseiler]

I checked SLES11 and SLES12 (and openSUSE 42.2) and the group for apache is "www" instead of "wwwrun" on all SUSE systems.

The user is wwwrun and the group www
$ id wwwrun
uid=30(wwwrun) gid=8(www) groups=8(www)

[pseiler]

The CI check failed because an error regarding Ubuntu 14.04 and not SUSE hosts.

These are the errors:

export BEAKER_set=docker/ubuntu-14.04
[...]
rspec ./spec/acceptance/vhost_spec.rb:1569 # apache::vhost define fastcgi applies cleanly
rspec ./spec/acceptance/vhost_spec.rb:1629 # apache::vhost define fastcgi File "/etc/apache2/sites-enabled/25-test.server.conf" should contain "FastCgiExternalServer localhost -socket /tmp/fast/1234"
rspec ./spec/acceptance/vhost_spec.rb:1630 # apache::vhost define fastcgi File "/etc/apache2/sites-enabled/25-test.server.conf" should contain "<Directory \"/tmp/fast\">"