Add Fedora 27 support

Removing the (f23,)f24 support they are EOL.
The only non-trivial change is the apache-httpd default worker change,
however might not be bad idea to use `event` instead of `worker`
in the future, but for now keep it AS-IS and continue to use `worker`.

Change-Id: I96d414a30b58bc4b43da45066fdf310a6a830079
Closes-Bug: #1740194
diff --git a/files/rpms/general b/files/rpms/general
index f3f8708..878b935 100644
--- a/files/rpms/general
+++ b/files/rpms/general
@@ -9,9 +9,9 @@
 graphviz # needed only for docs
 httpd
 httpd-devel
-iptables-services  # NOPRIME f23,f24,f25,f26
+iptables-services  # NOPRIME f25,f26,f27
 java-1.7.0-openjdk-headless  # NOPRIME rhel7
-java-1.8.0-openjdk-headless  # NOPRIME f23,f24,f25,f26
+java-1.8.0-openjdk-headless  # NOPRIME f25,f26,f27
 libffi-devel
 libjpeg-turbo-devel # Pillow 3.0.0
 libxml2-devel # lxml