Skip deleted fixed ip address for os-fixed-ips extension

Return the correct fixed ip address info when the address record(s)
marked 'deleted' in db.

Fixes bug 1152958

Change-Id: I58ba47427753a81cd43eb618cff199c45f83322c
Signed-off-by: Zhi Yan Liu <zhiyanl@cn.ibm.com>
Merge "Skip deleted fixed ip address for os-fixed-ips extension"