scripted-diff: Rename mininode to p2p

-BEGIN VERIFY SCRIPT-
sed -i 's/\.mininode/\.p2p/g' $(git grep -l "mininode")
git mv test/functional/test_framework/mininode.py test/functional/test_framework/p2p.py
-END VERIFY SCRIPT-

test/functional/example_test.py

@@ -16,7 +16,7 @@ from collections import defaultdict
 # Avoid wildcard * imports
 from test_framework.blocktools import (create_block, create_coinbase)
 from test_framework.messages import CInv, MSG_BLOCK
-from test_framework.mininode import (
+from test_framework.p2p import (
     P2PInterface,
     p2p_lock,
     msg_block,