[XENAPI] Example tools to create/destroy/shutdown VMs

Example Session:

xapi.py vm-list
xapi.py host-info
xapi.py vm-create xapi.domcfg.py
xapi.py vbd-create GentooAPI xapi.vbdcfg.py
xapi.py vif-create GentooAPI xapi.vifcfg.py
xapi.py vm-start GentooAPI
xapi.py vm-shutdown GentooAPI
xapi.py vm-delete xapi.py

signed-off-by: Alastair Tse <atse@xensource.com>

tools/python/scripts/xapi.vbdcfg.py

@@ -0,0 +1,12 @@
+#
+# Virtual Block Device (VBD) Xen API Configuration
+# 
+# Note: There is a non-API field here called "image" which is a backwards
+#       compat addition so you can mount to old images.
+# 
+
+VDI =  ''
+device = 'sda1'
+mode = 'RW'
+driver = 'paravirtualised'
+image = 'file:/root/gentoo-64-xenU.img'