libs/rpms : update for CentOS 7 removal

With the removal of CentOS 7, we can re-evaluate the rpm
installations.

We should not need virtualenv after https://review.opendev.org/712609

There should be no need for python-devel as we're python3

pyOpenSSL was added to workaround memory issues in
9e98f9435ec36f2fffed0ac368befd520f07e0e1 (2015) ... I think we've
moved on.

pyxattr is not a package; remove it.

I don't see we need packaged m2crypto, which isn't a package on CentOS
8.  nor libxml2-python; these days it has wheels which should work
with the normal installation process.

centos8 has:

 * targetcli
 * pcp-system-tools (and no dstat)
 * iptables-services
 * java-1.8.0-openjdk-headless
 * kernel-modules
 * rsync-daemon

just as all supported fedora's do, so we can remove any matching here.

Change-Id: I542c426a67a98f331d2a29bacd220af81fab8cc4
diff --git a/files/rpms/general b/files/rpms/general
index b150a57..ff77ce0 100644
--- a/files/rpms/general
+++ b/files/rpms/general
@@ -9,9 +9,8 @@
 graphviz # needed only for docs
 httpd
 httpd-devel
-iptables-services  # NOPRIME f30,f31
-java-1.7.0-openjdk-headless  # NOPRIME rhel7
-java-1.8.0-openjdk-headless  # NOPRIME f30,f31
+iptables-services
+java-1.8.0-openjdk-headless
 libffi-devel
 libjpeg-turbo-devel # Pillow 3.0.0
 libxml2-devel # lxml
@@ -25,10 +24,7 @@
 pkgconfig
 postgresql-devel  # psycopg2
 psmisc
-pyOpenSSL # version in pip uses too much memory
-python3-devel # dist:f30,f31
-python3-virtualenv # dist:f31
-python-devel
+python3-devel
 redhat-rpm-config # missing dep for gcc hardening flags, see rhbz#1217376
 systemd-devel # for systemd-python
 tar