nova: Use iscsi-initiator-utils 2.1.0 on Fedora 30 and 31

I2f16658c5a3e22cac70912a0f3ad65cdd7071a1e worked around an open-iscsi
bug that remains unpatched in Fedora 30 and 31 by using a private copr
repo with the patch applied. Rawhide has finally been rebased to 2.1.0
where this issue and many others have been resolved.

We can now use a new repo that has been built for Fedora 30 and 31 that
provides this rebased package that we can either use until the rebase is
backported to 31 and 30 or 32 is supported.

Change-Id: I5ba5885bd9c784949602aeb4ddff9d75fecc6b3d

Author: lyarwood

lib/nova

@@ -297,14 +297,20 @@ function configure_nova {
             fi
         fi
 
-        if is_fedora && [[ $DISTRO =~ f[0-9][0-9] ]]; then
+        if is_fedora && [[ $DISTRO =~ f29 ]]; then
             # There is an iscsi-initiator bug where it inserts
             # different whitespace that causes a bunch of output
             # matching to fail.  We have not been able to get
             # fixed, yet :/  Exists in fedora 29 & 30 at least
             #  https://bugzilla.redhat.com/show_bug.cgi?id=1676365
             sudo dnf copr enable -y iwienand/iscsi-initiator-utils
             sudo dnf update -y
+        elif is_fedora && [[ $DISTRO =~ f3[0-1] ]]; then
+            # For f30 and f31 use the rebased 2.1.0 version of the package. We
+            # can't use this above as f29 is EOL and as a result we can't
+            # rebuild packages in copr for it.
+            sudo dnf copr enable -y lyarwood/iscsi-initiator-utils
+            sudo dnf update -y
         fi
 
         if [[ ${ISCSID_DEBUG} == "True" ]]; then