Fix caching of error code data not happening

The state_to_status() function re-generates the mapping dict on
every call, which could negatively affect performance.
This change only generates the mapping dict on first call and
caches it for subsequent calls.

Issue-Id: RIC-862

Signed-off-by: Alexandre Huff <alexandrehuff@utfpr.edu.br>
Change-Id: Ida25c5d1f08b4b82e100b6c67ffe911bb8093224
1 file changed