Fix migrate errors.

Change-Id: I3d76cc860ab752b489ff0a3489be3e710692663a
Fix datastores not to use ldap_schemas directly.

Change-Id: Ibd981aa961b227cf22719e9cbbac8d61fac26110
Add missing depends on python-tk.

Change-Id: I91f851873016381d8d2a11035d85540d7dec97cf
Fix xmlrpc procedures.

Note addition of machine_name parameter. Is optional to allow for
backwards compatability, however now always be supplied.

Change-Id: Ic0d05e2fe0ad92ce687af0ef3c71ecbc39562fc6