qemuhotplugtest: Test guestfwd attach and detach

Previous two commits demonstrate a hole in our test scenario.
Fix that.
Signed-off-by: NMichal Privoznik <mprivozn@redhat.com>
Reviewed-by: NJohn Ferlan <jferlan@redhat.com>

tests/qemuhotplugtest.c

@@ -796,6 +796,12 @@ mymain(void)
     DO_TEST_DETACH("base-live", "watchdog-user-alias-full", false, false,
                    "device_del", QMP_DEVICE_DELETED("ua-UserWatchdog") QMP_OK);
 
+    DO_TEST_ATTACH("base-live", "guestfwd", false, true,
+                   "chardev-add", QMP_OK,
+                   "netdev_add", QMP_OK);
+    DO_TEST_DETACH("base-live", "guestfwd", false, false,
+                   "netdev_del", QMP_OK);
+
 #define DO_TEST_CPU_GROUP(prefix, vcpus, modernhp, expectfail) \
     do { \
         cpudata.test = prefix; \

tests/qemuhotplugtestdevices/qemuhotplug-guestfwd.xml

+<channel type='unix'>
+  <source mode='bind' path='/tmp/guestfwd'/>
+  <target type='guestfwd' address='10.0.2.1' port='4600'/>
+</channel>

tests/qemuhotplugtestdomains/qemuhotplug-base-live+guestfwd.xml

+<domain type='kvm' id='7'>
+  <name>hotplug</name>
+  <uuid>d091ea82-29e6-2e34-3005-f02617b36e87</uuid>
+  <memory unit='KiB'>4194304</memory>
+  <currentMemory unit='KiB'>4194304</currentMemory>
+  <vcpu placement='static'>4</vcpu>
+  <os>
+    <type arch='x86_64' machine='pc'>hvm</type>
+    <boot dev='hd'/>
+  </os>
+  <features>
+    <acpi/>
+    <apic/>
+    <pae/>
+  </features>
+  <clock offset='utc'/>
+  <on_poweroff>destroy</on_poweroff>
+  <on_reboot>restart</on_reboot>
+  <on_crash>restart</on_crash>
+  <devices>
+    <emulator>/usr/bin/qemu-system-x86_64</emulator>
+    <controller type='usb' index='0'>
+      <alias name='usb'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x2'/>
+    </controller>
+    <controller type='ide' index='0'>
+      <alias name='ide'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/>
+    </controller>
+    <controller type='scsi' index='0' model='virtio-scsi'>
+      <alias name='scsi0'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/>
+    </controller>
+    <controller type='pci' index='0' model='pci-root'>
+      <alias name='pci'/>
+    </controller>
+    <controller type='virtio-serial' index='0'>
+      <alias name='virtio-serial0'/>
+      <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/>
+    </controller>
+    <channel type='unix'>
+      <source mode='bind' path='/tmp/guestfwd'/>
+      <target type='guestfwd' address='10.0.2.1' port='4600'/>
+      <alias name='channel0'/>
+    </channel>
+    <input type='mouse' bus='ps2'>
+      <alias name='input0'/>
+    </input>
+    <input type='keyboard' bus='ps2'>
+      <alias name='input1'/>
+    </input>
+    <memballoon model='none'/>
+  </devices>
+  <seclabel type='none' model='none'/>
+</domain>