Fix bug 2290: Error in 'ResourceSkusOperations.list()' when instantiating on Azure.
Added 'filter' parameter required by the 'resource_skus.list()' method.
Change-Id: I5f9350ccc1844c4b5a4d32ed7154494c92a4c928
Signed-off-by: aguilard <e.dah.tid@telefonica.com>