Add distro support for KVM for IBM z Systems

Add "KVM for IBM z Systems" to the list of Fedora-like distros.

As the distribution does not have a dedicated kvm package,
prevent the installation of the kvm package during the libvirt
setup.

Change-Id: Ibb5c60797d6867264f9dea7fea85cdf1d7c72ded
diff --git a/functions-common b/functions-common
index a150dc5..e2ebd53 100644
--- a/functions-common
+++ b/functions-common
@@ -410,6 +410,8 @@
         DISTRO="rhel${os_RELEASE::1}"
     elif [[ "$os_VENDOR" =~ (XenServer) ]]; then
         DISTRO="xs$os_RELEASE"
+    elif [[ "$os_VENDOR" =~ (kvmibm) ]]; then
+        DISTRO="${os_VENDOR}${os_RELEASE::1}"
     else
         # Catch-all for now is Vendor + Release + Update
         DISTRO="$os_VENDOR-$os_RELEASE.$os_UPDATE"
@@ -444,7 +446,7 @@
 
     [ "$os_VENDOR" = "Fedora" ] || [ "$os_VENDOR" = "Red Hat" ] || \
         [ "$os_VENDOR" = "CentOS" ] || [ "$os_VENDOR" = "OracleLinux" ] || \
-        [ "$os_VENDOR" = "CloudLinux" ]
+        [ "$os_VENDOR" = "CloudLinux" ] || [ "$os_VENDOR" = "kvmibm" ]
 }