[Java] Avoid checking parentMessage.actingVersion inside composite.

Most not present conditions were already elided via
`generateFieldNotPresentCondition(inComposite=true, ...)` but the
condition within the wrap method was not.

Here's an example of a failing schema found with the DTO property-based
tests:

```
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<sbe:messageSchema id="42" package="uk.co.real_logic.sbe.properties" version="1" xmlns:sbe="http://fixprotocol.io/2016/sbe">
  <types>
    <composite name="messageHeader">
      <type name="blockLength" primitiveType="uint16"/>
      <type name="templateId" primitiveType="uint16"/>
      <type name="schemaId" primitiveType="uint16"/>
      <type name="version" primitiveType="uint16"/>
    </composite>
    <composite name="groupSizeEncoding">
      <type name="blockLength" primitiveType="uint16"/>
      <type name="numInGroup" primitiveType="uint16"/>
    </composite>
    <composite name="Type1">
      <type length="2" name="member0OfType0" presence="required" primitiveType="uint8"/>
    </composite>
  </types>
  <sbe:message id="1" name="TestMessage">
    <field id="0" name="member0" presence="optional" sinceVersion="1" type="Type1"/>
  </sbe:message>
</sbe:messageSchema>
```

And generated code (within a composite without a `parentMessage`):

```
    public void wrapMember0OfType0(final DirectBuffer wrapBuffer)
    {
        if (parentMessage.actingVersion < 1)
        {
            wrapBuffer.wrap(buffer, offset, 0);
            return;
        }

        wrapBuffer.wrap(buffer, offset + 0, 2);
    }
```

Author: ZachBray

sbe-tool/src/main/java/uk/co/real_logic/sbe/generation/java/JavaGenerator.java

@@ -1665,7 +1665,7 @@ private void generateVarDataWrapDecoder(
             indent + "    }\n",
             propertyName,
             readOnlyBuffer,
-            generateWrapFieldNotPresentCondition(token.version(), indent),
+            generateWrapFieldNotPresentCondition(false, token.version(), indent),
             accessOrderListenerCall,
             sizeOfLengthField,
             PrimitiveType.UINT32 == lengthType ? "(int)" : "",
@@ -2671,9 +2671,12 @@ private CharSequence generatePrimitivePropertyEncode(
             generatePut(encoding.primitiveType(), "offset + " + offset, "value", byteOrderStr));
     }
 
-    private CharSequence generateWrapFieldNotPresentCondition(final int sinceVersion, final String indent)
+    private CharSequence generateWrapFieldNotPresentCondition(
+        final boolean inComposite,
+        final int sinceVersion,
+        final String indent)
     {
-        if (0 == sinceVersion)
+        if (inComposite || 0 == sinceVersion)
         {
             return "";
         }
@@ -2925,7 +2928,7 @@ else if (encoding.primitiveType() == PrimitiveType.UINT8)
                 indent + "    }\n",
                 Generators.toUpperFirstChar(propertyName),
                 readOnlyBuffer,
-                generateWrapFieldNotPresentCondition(propertyToken.version(), indent),
+                generateWrapFieldNotPresentCondition(inComposite, propertyToken.version(), indent),
                 accessOrderListenerCall,
                 offset,
                 fieldLength);