parallels: substitute parallels with vz spec file and Makefile

Since we have changed the name of the driver to vz, let's
reference it as vz everywhere.

Signed-off-by: Maxim Nestratov <mnestratov@parallels.com>

libvirt.spec.in

@@ -97,7 +97,7 @@
 %define with_esx           0%{!?_without_esx:1}
 %define with_hyperv        0%{!?_without_hyperv:1}
 %define with_xenapi        0%{!?_without_xenapi:1}
-%define with_parallels     0%{!?_without_parallels:1}
+%define with_vz            0%{!?_without_vz:1}
 # No test for bhyve, because it does not build on Linux
 
 # Then the secondary host drivers, which run inside libvirtd
@@ -201,7 +201,7 @@
     %define with_xenapi 0
     %define with_libxl 0
     %define with_hyperv 0
-    %define with_parallels 0
+    %define with_vz 0
 %endif
 
 # Fedora 17 / RHEL-7 are first where we use systemd. Although earlier
@@ -1317,8 +1317,8 @@ rm -f $PATCHLIST
     %define _without_vmware --without-vmware
 %endif
 
-%if ! %{with_parallels}
-    %define _without_parallels --without-parallels
+%if ! %{with_vz}
+    %define _without_vz --without-vz
 %endif
 
 %if ! %{with_polkit}
@@ -1500,7 +1500,7 @@ rm -f po/stamp-po
            %{?_without_esx} \
            %{?_without_hyperv} \
            %{?_without_vmware} \
-           %{?_without_parallels} \
+           %{?_without_vz} \
            --without-bhyve \
            %{?_without_interface} \
            %{?_without_network} \