TOML error string fix. (#401)

Signed-off-by: Mark Terry <mark.terry@consensys.net>

src/main/java/net/consensys/orion/config/Config.java

@@ -71,14 +71,15 @@ public static Config load(final InputStream is) throws IOException {
   }
 
   @VisibleForTesting
-  public static Config load(final InputStream is, Map<String, String> env) throws IOException {
+  public static Config load(final InputStream is, final Map<String, String> env) throws IOException {
     return load(Configuration.fromToml(is, SCHEMA), env);
   }
 
-  private static Config load(final Configuration configuration, Map<String, String> env) {
+  private static Config load(final Configuration configuration, final Map<String, String> env) {
     final List<ConfigurationError> errors = configuration.errors();
     if (!errors.isEmpty()) {
-      String errorString = errors.stream().limit(5).map(ConfigurationError::toString).collect(Collectors.joining("\n"));
+      String errorString =
+          errors.stream().limit(5).map(ConfigurationError::getMessage).collect(Collectors.joining("\n"));
       if (errors.size() > 5) {
         errorString += "\n...";
       }

src/test/java/net/consensys/orion/config/TomlConfigTest.java

@@ -136,16 +136,10 @@ void invalidConfigsThrowException() {
     final ConfigException e = assertThrows(
         ConfigException.class,
         () -> Config.load(this.getClass().getClassLoader().getResourceAsStream("invalidConfigTest.toml")));
-    final String tuweniPrefix = "org.apache.tuweni.config.ConfigurationError: ";
-    final String message = tuweniPrefix
-        + "Value of property 'clienturl' is not a valid URL (line 4, column 1)\n"
-        + tuweniPrefix
+    final String message = "Value of property 'clienturl' is not a valid URL (line 4, column 1)\n"
         + "Value of property 'storage' must have storage type of \"leveldb\", \"mapdb\", \"sql\" or \"memory\" (line 11, column 1)\n"
-        + tuweniPrefix
         + "Value of property 'othernodes' is not a valid URL (line 6, column 1)\n"
-        + tuweniPrefix
         + "Value of property 'othernodes' is not a valid URL (line 6, column 1)\n"
-        + tuweniPrefix
         + "Value of property 'tlsservertrust' should be \"whitelist\", \"ca\", \"ca-or-whitelist\", \"tofu\", \"insecure-tofa\", \"ca-or-tofu\", \"insecure-ca-or-tofa\", \"insecure-no-validation\", \"insecure-record\", or \"insecure-ca-or-record\" (line 9, column 1)\n"
         + "...";
     assertEquals(message, e.getMessage());