Reverting b64acbdf5df5ffa42605bbbb1a5ed5e3d0ddf74f but fixing the variable name 'BUILD_NUMBER' so that is does actually increment with each XenServer build.
Reverting b64acbdf5df5ffa42605bbbb1a5ed5e3d0ddf74f but fixing the
variable name 'BUILD_NUMBER' so that is does actually increment with
each XenServer build.

Signed-off-by: Rob Dobson <564e7c9301873eb0e5b6866dcaa1b131933d2ed5@citrix.com>

olivierlambert/xscontainer,olivierlambert/xscontainer,xenserver/xscontainer,xenserver/xscontainer,robertbreker/xscontainer,robertbreker/xscontainer