Add Fedora 30 as a supported distro

With Fedora 29 now officially EOL [1] we need to start the move to 30. A
later change will remove f29 support from devstack entirely once
fedora-latest moves to the based f30 image.

[1] https://lists.fedoraproject.org/archives/list/devel-announce@lists.fedoraproject.org/thread/VUK3CJ5LO4ROUH3JTCDVHYAVVYAOCU62/

Change-Id: If87fe93757129f931a3417fc6275ffad280cdf46
diff --git a/files/rpms/general b/files/rpms/general
index 15d329d..279546f 100644
--- a/files/rpms/general
+++ b/files/rpms/general
@@ -9,9 +9,9 @@
 graphviz # needed only for docs
 httpd
 httpd-devel
-iptables-services  # NOPRIME f25,f26,f27,f28,f29
+iptables-services  # NOPRIME f25,f26,f27,f28,f29,f30
 java-1.7.0-openjdk-headless  # NOPRIME rhel7
-java-1.8.0-openjdk-headless  # NOPRIME f25,f26,f27,f28,f29
+java-1.8.0-openjdk-headless  # NOPRIME f25,f26,f27,f28,f29,f30
 libffi-devel
 libjpeg-turbo-devel # Pillow 3.0.0
 libxml2-devel # lxml