MYOB GL API; implemented API Rate limit retry

The MYOB API may fail with a 403 Forbidden error, with the message "ERROR: API key has exceeded the per-second rate limit" or "ERROR: API key has exceeded the daily rate limit".

finPOWER Connect now includes the following strategy - If the request fails with a Status 403, finPOWER Connect will wait for a short period and then try sending the request again. This happens 5 times with an increasing wait period of 2, 4, 8, 16 and 32 seconds (a total potential wait of 62 seconds).

NOTE: This should all but eliminate the per second limit - but not the per day limit.