Merge #2881: [TEST] Fix random fee generation

7203d91 Fix random fee generation (panleone)

Pull request description:

  The librustzcash update (PR #2870) made shield txs slightly increase in size, this led the functional test feature_blockindexstats.py to fail when the (random) generated fee is too low. With this PR I simply increase the minimum generated fee in order to avoid the issue.

ACKs for top commit: 7203d91
  Liquid369:
    ACK 7203d91
  Fuzzbawls:
    ACK 7203d91

Tree-SHA512: 2a30271dbe6a72b95aefc5a0fd6bc1a3a03710247a547842f56f9ebc6c3446439ff33d4cef6d909bd0d648e72dd80e2c36e5cb55287573232572fe5024b1aa3c

test/functional/feature_blockindexstats.py

@@ -106,7 +106,7 @@ def run_test(self):
  for _ in range(NUM_BLOCKS):
  # 1...4=(t->t) 5=(t->z) 6=(z->t) 7=(z->z)
  tx_kind = random.randint(1, 7)
- fee = round(0.0001 * random.randint(3, 50), 8)
+ fee = round(0.0001 * random.randint(5, 50), 8)
  if tx_kind < 5:
  # transparent tx
  self.log.info("Sending t->t with fee %.8f" % fee)