[Java] Fix JsonPrinting version validation.

Author: mjpt777

sbe-tool/src/main/java/uk/co/real_logic/sbe/json/JsonPrinter.java

@@ -55,7 +55,6 @@ public void print(final StringBuilder output, final UnsafeBuffer buffer, final i
  validateVersion(schemaId, actingVersion);
 
  final int messageOffset = bufferOffset + headerDecoder.encodedLength();
-
  final List<Token> msgTokens = ir.getMessage(templateId);
 
  OtfMessageDecoder.decode(
@@ -71,8 +70,7 @@ private void validateId(final int schemaId)
  {
  if (schemaId != ir.id())
  {
- throw new IllegalArgumentException(
- String.format("Required schema id %d but was actually %d", ir.id(), schemaId));
+ throw new IllegalArgumentException("Required schema id " + ir.id() + " but was " + schemaId);
  }
  }
 
@@ -81,7 +79,7 @@ private void validateVersion(final int schemaId, final int actingVersion)
  if (actingVersion > ir.version())
  {
  throw new IllegalArgumentException(
- String.format("Required schema id %d but was actually %d", ir.id(), schemaId));
+ "Required schema version " + actingVersion + " but was " + ir.version() + " for schema id " + schemaId);
  }
  }