update scripts name

Author: yungwine

support/clear_backup.sh renamed to support/extract_backup_node_keys.sh

@@ -45,4 +45,4 @@ rm -rf ${tmp_dir}/db/old_keyring
 tar -zcf $dest -C $tmp_dir .
 chown $user:$user $dest
 
-echo -e "Cleared backup successfully created in ${dest}!"
+echo -e "Node keys backup successfully created in ${dest}!"

support/setup_cleared_backup.py renamed to support/inject_backup_node_keys.py

@@ -23,7 +23,7 @@ def run_vc(cmd: str):
 vc_address = args.a
 
 if not name or not vc_address:
-    print("Usage: setup_cleared_backup.py -n <backup_name> -a <vc_address>")
+    print("Usage: inject_backup_node_keys.py -n <backup_name> -a <vc_address>")
     exit(1)