fix: intermittent error in p2p_invalid_block.py

Mocktime here is misused here `t = int(time.time())`

Functional test p2p_invalid_block.py is changed are adjusted for Dash Core

Author: knst

test/functional/p2p_invalid_block.py

@@ -13,7 +13,6 @@
 becomes valid.
 """
 import copy
-import time
 
 from test_framework.blocktools import MAX_FUTURE_BLOCK_TIME, create_block, create_coinbase, create_tx_with_script
 from test_framework.messages import COIN
@@ -132,15 +131,14 @@ def run_test(self):
         peer.send_blocks_and_test([block4], node, success=False,  reject_reason='bad-txns-inputs-duplicate')
 
         self.log.info("Test accepting identical block after rejecting it due to a future timestamp.")
-        t = int(time.time())
-        node.setmocktime(t)
+        t = self.mocktime
         # Set block time +1 second past max future validity
         block = create_block(tip, create_coinbase(height), t + MAX_FUTURE_BLOCK_TIME + 1)
         block.hashMerkleRoot = block.calc_merkle_root()
         block.solve()
         # Need force_send because the block will get rejected without a getdata otherwise
         peer.send_blocks_and_test([block], node, force_send=True, success=False, reject_reason='time-too-new')
-        node.setmocktime(t + 1)
+        self.bump_mocktime(1)
         peer.send_blocks_and_test([block], node, success=True)