test: create assert_not_equal 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 new assertion

test/functional/p2p_sendtxrcncl.py

@@ -19,7 +19,10 @@ from test_framework.p2p import (
     P2P_VERSION,
 )
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import assert_equal
+from test_framework.util import (
+    assert_equal,
+    assert_not_equal,
+)
 
 class PeerNoVerack(P2PInterface):
     def __init__(self, wtxidrelay=True):
@@ -119,7 +122,7 @@ class SendTxRcnclTest(BitcoinTestFramework):
         no_txrelay_version_msg.relay = 0
         peer.send_without_ping(no_txrelay_version_msg)
         peer.wait_for_verack()
-        assert peer.nServices & NODE_BLOOM != 0
+        assert_not_equal(peer.nServices & NODE_BLOOM, 0)
         assert not peer.sendtxrcncl_msg_received
         self.nodes[0].disconnect_p2ps()