Fix for typo in xml API doc sample in nova

Modified:   doc/api_samples/os-flavor-manage/flavor-create-post-req.json
Deleted final comma for proper syntax
Partially fixes: bug 1088528 (part of the bug requires changes in other repo - done)

Change-Id: I5b0b29b4c720a95d5c4c5d957e77dc2e4c9cf8ee
Merge "Fix for typo in xml API doc sample in nova"