KAZOO-1923: cleanup wnm_bandwidth
KAZOO-1924: Vitelity stub carrier module
KAZOO-1923: spec/type updates, move decr_timeout to wh_util
KAZOO-1923: add insert_value/3 which will only set a value if it doesn't exist already
KAZOO-1924: start to process XML responses from Vitelity
KAZOO-1923: fix spec
KAZOO-1923: xml helper funs
KAZOO-1923: use the xml helper module
KAZOO-1924: find numbers using the various Vitelity APIs
KAZOO-1924: remove logging
KAZOO-1924: handle no numbers in an NPANXX rate area
KAZOO-1923: fix spec type