wallet: Use PACKAGE_NAME to mention our software

test/functional/wallet_multiwallet.py

@@ -202,7 +202,7 @@ class MultiWalletTest(BitcoinTestFramework):
         self.restart_node(0, ['-nowallet', '-walletdir=' + competing_wallet_dir])
         self.nodes[0].createwallet(self.default_wallet_name)
         if self.options.descriptors:
-            exp_stderr = r"Error: SQLiteDatabase: Unable to obtain an exclusive lock on the database, is it being used by another bitcoind?"
+            exp_stderr = f"Error: SQLiteDatabase: Unable to obtain an exclusive lock on the database, is it being used by another instance of {self.config['environment']['PACKAGE_NAME']}?"
         else:
             exp_stderr = r"Error: Error initializing wallet database environment \"\S+competing_walletdir\S*\"!"
         self.nodes[1].assert_start_raises_init_error(['-walletdir=' + competing_wallet_dir], exp_stderr, match=ErrorMatch.PARTIAL_REGEX)
@@ -303,7 +303,7 @@ class MultiWalletTest(BitcoinTestFramework):
         # Fail to load duplicate wallets
         path = os.path.join(self.options.tmpdir, "node0", "regtest", "wallets", "w1", "wallet.dat")
         if self.options.descriptors:
-            assert_raises_rpc_error(-4, "Wallet file verification failed. SQLiteDatabase: Unable to obtain an exclusive lock on the database, is it being used by another bitcoind?", self.nodes[0].loadwallet, wallet_names[0])
+            assert_raises_rpc_error(-4, f"Wallet file verification failed. SQLiteDatabase: Unable to obtain an exclusive lock on the database, is it being used by another instance of {self.config['environment']['PACKAGE_NAME']}?", self.nodes[0].loadwallet, wallet_names[0])
         else:
             assert_raises_rpc_error(-35, "Wallet file verification failed. Refusing to load database. Data file '{}' is already loaded.".format(path), self.nodes[0].loadwallet, wallet_names[0])