tests: send more data during rate_limit test to help iperf3

iperf3 3.16 needs to send more data to reliably detect the throughtput.

Signed-off-by: Pablo Barbáchano <[email protected]>

tests/integration_tests/performance/test_rate_limiter.py

@@ -19,7 +19,7 @@
 RATE_LIMIT_BYTES = 10485760
 
 # The initial token bucket size
-BURST_SIZE = 104857600
+BURST_SIZE = RATE_LIMIT_BYTES * 50
 
 # The refill time for the token bucket
 REFILL_TIME_MS = 100