Add xml:ids to resources

Add xml:ids to resources. This is a new requirement that has to do
with the generation of PDFs from WADL files – without this, the paths
are not unique across WADL files

Related-Bug: #1275007

Change-Id: I0cda675b828a0af5bede9d0b99a7fb876bfbdf5e
Merge "Add xml:ids to resources"