restapi : --parent-tag-id|name options doesn't exists in 'add tag' options

From cli --parent-tag-id and --parent-tag-name options doesn't exists
in 'add tag' options, they are working (should be added to autocompletion)

Change-Id: I9e82ee769ba97f6e2765edb6990c4bdd6b88e29a
Bug-Url: https://bugzilla.redhat.com/961371
Signed-off-by: Ravi Nori <rnori@redhat.com>