VMware: remove unused method _get_vmfolder_ref

This method was only used in the ESX driver. That was deprecated
in Juno.

Change-Id: Ied0fdf835c18c4a2c9ca080379e13bfd72d825c2
Exceptions: finish sentence with fullstop

Commit 5936b2158da16bc0dbcaa99d5009a76f077999d7 added an exception
that was terminated by a comma instead of a full stop.

TrivialFix

Change-Id: I05ee9d9a0a68eeb41fa66b6ec5ad7522eb5c386a
Make objects.Flavor._orig_projects a list

The projects field is a list type but the init was
defaulting it to an empty dict. This simply makes it
a list.

This was apparently not causing any problems, but it's
not correct so we might as well fix it.

Change-Id: If22514f79e5e45b15e3b777c89713f7014112d99
Merge "Exceptions: finish sentence with fullstop"
Merge "Make objects.Flavor._orig_projects a list"
Merge "VMware: remove unused method _get_vmfolder_ref"