fork_sync: fix boot nodes (near#8711)

Author: saketh-are

pytest/tests/adversarial/fork_sync.py

@@ -46,7 +46,7 @@
 logger.info("killing node 2 and 3")
 
 for i in range(2):
-    nodes[i].start(boot_node=nodes[i])
+    nodes[i].start(boot_node=nodes[0])
     res = nodes[i].json_rpc('adv_disable_doomslug', [])
     assert 'result' in res, res
 
@@ -55,7 +55,7 @@
 utils.wait_for_blocks(nodes[0], target=FIRST_STEP_WAIT + SECOND_STEP_WAIT)
 
 for i in range(2, 4):
-    nodes[i].start(boot_node=nodes[i])
+    nodes[i].start(boot_node=nodes[0])
     res = nodes[i].json_rpc('adv_disable_doomslug', [])
     assert 'result' in res, res