tests: Make msg_block a witness block

This diff has been generated with the following script, but is better
reviewed without looking at the script.

 # -BEGIN VERIFY SCRIPT-
echo "Use msg_witness_block everywhere, except for tests that require msg_block"
 # This could be a separate commit, but it is combined with the
 # following scripts to reduce the overall diff
sed -i -e 's/msg_block/msg_witness_block/g' ./test/functional/{feature_assumevalid,feature_cltv,feature_dersig,feature_versionbits_warning,p2p_fingerprint,p2p_sendheaders,p2p_unrequested_blocks,example_test,rpc_blockchain}.py

echo "Rename msg_block to msg_no_witness_block"
 # Rename msg_block to msg_no_witness_block in all tests (not the
 # framework)
sed -i -e 's/msg_block/msg_no_witness_block/g' $(git grep -l msg_block ./test/functional/*.py)
 # Derive msg_no_witness_block from msg_block
 # Make msg_block a witness block in messages.py
patch -p1 --fuzz 0 << EOF
diff --git a/test/functional/test_framework/messages.py b/test/functional/test_framework/messages.py
index 00190e4cbd..e454ed5987 100755
--- a/test/functional/test_framework/messages.py
+++ b/test/functional/test_framework/messages.py
@@ -1133 +1133 @@ class msg_block:
-        return self.block.serialize(with_witness=False)
+        return self.block.serialize()
@@ -1155 +1155 @@ class msg_generic:
-class msg_witness_block(msg_block):
+class msg_no_witness_block(msg_block):
@@ -1158,2 +1158 @@ class msg_witness_block(msg_block):
-        r = self.block.serialize()
-        return r
+        return self.block.serialize(with_witness=False)
@@ -1445 +1444 @@ class msg_blocktxn:
-        r += self.block_transactions.serialize(with_witness=False)
+        r += self.block_transactions.serialize()
@@ -1452 +1451 @@ class msg_blocktxn:
-class msg_witness_blocktxn(msg_blocktxn):
+class msg_no_witness_blocktxn(msg_blocktxn):
@@ -1456,3 +1455 @@ class msg_witness_blocktxn(msg_blocktxn):
-        r = b""
-        r += self.block_transactions.serialize()
-        return r
+        return self.block_transactions.serialize(with_witness=False)
EOF
 # Conclude rename of msg_block to msg_no_witness_block
sed -i -e 's/msg_witness_block/msg_block/g' $(git grep -l msg_witness_block)
 # -END VERIFY SCRIPT-

test/functional/test_framework/messages.py

@@ -1130,7 +1130,7 @@ class msg_block:
         self.block.deserialize(f)
 
     def serialize(self):
-        return self.block.serialize(with_witness=False)
+        return self.block.serialize()
 
     def __repr__(self):
         return "msg_block(block=%s)" % (repr(self.block))
@@ -1152,11 +1152,10 @@ class msg_generic:
         return "msg_generic()"
 
 
-class msg_witness_block(msg_block):
+class msg_no_witness_block(msg_block):
     __slots__ = ()
     def serialize(self):
-        r = self.block.serialize()
-        return r
+        return self.block.serialize(with_witness=False)
 
 
 class msg_getaddr:
@@ -1442,17 +1441,15 @@ class msg_blocktxn:
 
     def serialize(self):
         r = b""
-        r += self.block_transactions.serialize(with_witness=False)
+        r += self.block_transactions.serialize()
         return r
 
     def __repr__(self):
         return "msg_blocktxn(block_transactions=%s)" % (repr(self.block_transactions))
 
 
-class msg_witness_blocktxn(msg_blocktxn):
+class msg_no_witness_blocktxn(msg_blocktxn):
     __slots__ = ()
 
     def serialize(self):
-        r = b""
-        r += self.block_transactions.serialize()
-        return r
+        return self.block_transactions.serialize(with_witness=False)