scripted-diff: test: Replace uses of (dis)?connect_nodes global

-BEGIN VERIFY SCRIPT-

 # max-depth=0 excludes test/functional/test_framework/...
 FILES=$(git grep -l --max-depth 0 "connect_nodes" test/functional)

 # Replace (dis)?connect_nodes(self.nodes[a], b) with self.(dis)?connect_nodes(a, b)
 sed -i 's/\b\(dis\)\?connect_nodes(self\.nodes\[\(.*\)\]/self.\1connect_nodes(\2/g' $FILES

 # Remove imports in the middle of a line
 sed -i 's/\(dis\)\?connect_nodes, //g' $FILES
 sed -i 's/, \(dis\)\?connect_nodes//g' $FILES

 # Remove imports on a line by themselves
 sed -i '/^\s*\(dis\)\?connect_nodes,\?$/d' $FILES
 sed -i '/^from test_framework\.util import connect_nodes$/d' $FILES

-END VERIFY SCRIPT-

Co-authored-by: Elliott Jin <elliott.jin@gmail.com>

test/functional/feature_abortnode.py

@@ -11,7 +11,7 @@
 """
 
 from test_framework.test_framework import BitcoinTestFramework
-from test_framework.util import get_datadir_path, connect_nodes
+from test_framework.util import get_datadir_path
 import os
 
 
@@ -36,7 +36,7 @@ class AbortNodeTest(BitcoinTestFramework):
         # attempt.
         self.nodes[1].generate(3)
         with self.nodes[0].assert_debug_log(["Failed to disconnect block"]):
-            connect_nodes(self.nodes[0], 1)
+            self.connect_nodes(0, 1)
             self.nodes[1].generate(1)
 
             # Check that node0 aborted