test: create assert_less_than util and add to where imports are needed

In the functional tests there are lots of cases where we assert < which
this new util will replace, we also are adding the imports and the
following commit will add the new assertion

Author: kevkevinpal

test/functional/feature_block.py

@@ -51,6 +51,7 @@
 from test_framework.test_framework import BitcoinTestFramework
 from test_framework.util import (
     assert_equal,
+    assert_less_than,
     assert_greater_than,
 )
 from test_framework.wallet_util import generate_keypair

test/functional/feature_coinstatsindex.py

@@ -28,6 +28,7 @@
 from test_framework.test_framework import BitcoinTestFramework
 from test_framework.util import (
     assert_equal,
+    assert_less_than,
     assert_raises_rpc_error,
 )
 from test_framework.wallet import (

test/functional/feature_rbf.py

@@ -14,6 +14,7 @@
 from test_framework.test_framework import BitcoinTestFramework
 from test_framework.util import (
     assert_equal,
+    assert_less_than,
     assert_raises_rpc_error,
 )
 from test_framework.wallet import MiniWallet

test/functional/mempool_resurrect.py

@@ -5,7 +5,10 @@
 """Test resurrection of mined transactions when the blockchain is re-organized."""
 
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import assert_equal
+from test_framework.util import (
+   assert_equal,
+   assert_less_than,
+)
 from test_framework.wallet import MiniWallet
 
 

test/functional/p2p_addr_relay.py

@@ -23,6 +23,7 @@
 from test_framework.test_framework import BitcoinTestFramework
 from test_framework.util import (
     assert_equal,
+    assert_less_than,
     assert_greater_than,
     assert_greater_than_or_equal
 )

test/functional/p2p_segwit.py

@@ -84,6 +84,7 @@
 from test_framework.test_framework import BitcoinTestFramework
 from test_framework.util import (
     assert_equal,
+    assert_less_than,
     softfork_active,
     assert_raises_rpc_error,
 )

test/functional/p2p_sendtxrcncl.py

@@ -19,7 +19,10 @@
     P2P_VERSION,
 )
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import assert_equal
+from test_framework.util import (
+    assert_equal,
+    assert_less_than,
+)
 
 class PeerNoVerack(P2PInterface):
     def __init__(self, wtxidrelay=True):

test/functional/rpc_blockchain.py

@@ -43,6 +43,7 @@
 from test_framework.test_framework import BitcoinTestFramework
 from test_framework.util import (
     assert_equal,
+    assert_less_than,
     assert_greater_than,
     assert_greater_than_or_equal,
     assert_raises,

test/functional/rpc_createmultisig.py

@@ -17,6 +17,7 @@
 from test_framework.util import (
     assert_raises_rpc_error,
     assert_equal,
+    assert_less_than,
 )
 from test_framework.wallet_util import generate_keypair
 from test_framework.wallet import (

test/functional/test_framework/blocktools.py

@@ -43,7 +43,10 @@
     keys_to_multisig_script,
     script_to_p2wsh_script,
 )
-from .util import assert_equal
+from .util import (
+    assert_equal,
+    assert_less_than,
+)
 
 WITNESS_SCALE_FACTOR = 4
 MAX_BLOCK_SIGOPS = 20000