Fix vxhs test to have stable certificate dir

The test suite has hardcoded /etc/pki/qemu as the cert dir, but this
only works if configure has --sysconfdir=/etc passed. We must set the
vxhs cert dir to a stable path in the test suite.
Signed-off-by: NDaniel P. Berrange <berrange@redhat.com>

tests/qemuxml2argvdata/qemuxml2argv-disk-drive-network-tlsx509-vxhs.args

@@ -20,7 +20,7 @@ server,nowait \
 -no-acpi \
 -boot c \
 -usb \
--object tls-creds-x509,id=objvirtio-disk0_tls0,dir=/etc/pki/qemu,\
+-object tls-creds-x509,id=objvirtio-disk0_tls0,dir=/etc/pki/libvirt-vxhs,\
 endpoint=client,verify-peer=yes \
 -drive file.driver=vxhs,file.tls-creds=objvirtio-disk0_tls0,\
 file.vdisk-id=eb90327c-8302-4725-9e1b-4e85ed4dc251,file.server.type=tcp,\
@@ -28,7 +28,7 @@ file.server.host=192.168.0.1,file.server.port=9999,format=raw,if=none,\
 id=drive-virtio-disk0,cache=none \
 -device virtio-blk-pci,bus=pci.0,addr=0x4,drive=drive-virtio-disk0,\
 id=virtio-disk0 \
--object tls-creds-x509,id=objvirtio-disk1_tls0,dir=/etc/pki/qemu,\
+-object tls-creds-x509,id=objvirtio-disk1_tls0,dir=/etc/pki/libvirt-vxhs,\
 endpoint=client,verify-peer=yes \
 -drive file.driver=vxhs,file.tls-creds=objvirtio-disk1_tls0,\
 file.vdisk-id=eb90327c-8302-4725-9e1b-4e85ed4dc252,file.server.type=tcp,\

tests/qemuxml2argvtest.c

@@ -599,6 +599,9 @@ mymain(void)
     VIR_FREE(driver.config->chardevTLSx509certdir);
     if (VIR_STRDUP_QUIET(driver.config->chardevTLSx509certdir, "/etc/pki/libvirt-chardev") < 0)
         return EXIT_FAILURE;
+    VIR_FREE(driver.config->vxhsTLSx509certdir);
+    if (VIR_STRDUP_QUIET(driver.config->vxhsTLSx509certdir, "/etc/pki/libvirt-vxhs") < 0)
+        return EXIT_FAILURE;
 
     VIR_FREE(driver.config->hugetlbfs);
     if (VIR_ALLOC_N(driver.config->hugetlbfs, 2) < 0)