[key-manager] remove default master key (#5998)

When initializing, we should use randomly generated network parameters
instead of default ones, to eliminate the possibility of unintentional
use of default credentials.

tests/scripts/expect/_multinode.exp

@@ -29,50 +29,61 @@
 
 source "tests/scripts/expect/_common.exp"
 
-proc setup_two_nodes {{childmode {r}} {should_spawn_node true}} {
+set JOINER_PSK "J01NME"
+
+proc setup_two_nodes {{childmode "r"} {should_spawn_node true}} {
     # Sets up a Thread network with 2 nodes, spawn_1 as the leader and spawn_2
     # as a child.
-    set psk "J01NME"
 
     if {$should_spawn_node} {
         spawn_node 2
-    } else {
-        switch_node 2
-    }
-    send "eui64\n"
-    expect -re {([0-9a-f]{16})}
-    set eui64 $expect_out(1,string)
-    expect "Done"
-
-    # Sets up a Thread network with node 1 as the leader.
-    if {$should_spawn_node} {
         spawn_node 1
     } else {
         switch_node 1
     }
     setup_leader
+    setup_node 2 $childmode "child"
+}
 
-    send "commissioner start\n"
+proc setup_node {node {mode "r"} {role "child"}} {
+    switch_node $node
+    send "eui64\n"
+    expect "eui64"
+    expect -re {([0-9a-f]{16})}
+    set eui64 $expect_out(1,string)
     expect "Done"
-    expect "Commissioner: active"
-    send "commissioner joiner add $eui64 $psk\n"
+
+    switch_node 1
+    send "commissioner state\n"
+    expect {
+        "disabled" {
+            expect "Done"
+            send "commissioner start\n"
+            expect "Done"
+            expect "Commissioner: active"
+        }
+        "active" {
+            expect "Done"
+        }
+    }
+    send "commissioner joiner add $eui64 $::JOINER_PSK\n"
     expect "Done"
     wait_for "netdata steeringdata check $eui64" "Done"
-    send "channel\n"
-    expect -re {(\d+)}
-    set channel $expect_out(1,string)
-    expect "Done"
 
-    switch_node 2
-    send "mode $childmode\n"
+    switch_node $node
+    send "mode $mode\n"
     expect "Done"
     send "ifconfig up\n"
     expect "Done"
-    send "joiner start $psk\n"
+    send "joiner start $::JOINER_PSK\n"
     expect "Done"
     wait_for "" "Join success"
     send "thread start\n"
     expect "Done"
-    wait_for "state" "child"
+    wait_for "state" $role
+    expect "Done"
+
+    switch_node 1
+    send "commissioner joiner remove $eui64\n"
     expect "Done"
 }