Add Fedora 34 support

* update the support distro filter

* don't install xinetd which doesn't exist in F34 any more.  I think
  there is probably a bit more to do with swift ring-server but that
  can be a problem for another time.

* remove old F31 workaround

Change-Id:If2f74f146a166b9721540aaf3f1f9fce3030525c

files/rpms/swift

@@ -4,4 +4,4 @@ memcached
 rsync-daemon
 sqlite
 xfsprogs
-xinetd
+xinetd # not:f34

lib/nova

@@ -298,12 +298,6 @@ function configure_nova {
             fi
         fi
 
-        if is_fedora && [[ $DISTRO =~ f31] ]]; then
-            # For f31 use the rebased 2.1.0 version of the package.
-            sudo dnf copr enable -y lyarwood/iscsi-initiator-utils
-            sudo dnf update -y
-        fi
-
         if [[ ${ISCSID_DEBUG} == "True" ]]; then
             # Install an override that starts iscsid with debugging
             # enabled.

stack.sh

@@ -227,7 +227,7 @@ write_devstack_version
 
 # Warn users who aren't on an explicitly supported distro, but allow them to
 # override check and attempt installation with ``FORCE=yes ./stack``
-SUPPORTED_DISTROS="focal|f31|f32|opensuse-15.2|opensuse-tumbleweed|rhel8"
+SUPPORTED_DISTROS="focal|f34|opensuse-15.2|opensuse-tumbleweed|rhel8"
 
 if [[ ! ${DISTRO} =~ $SUPPORTED_DISTROS ]]; then
     echo "WARNING: this script has not been tested on $DISTRO"