TCK failure messages use toString() on the message object array

[jamezp]

In the TCK assertion methods the final argument for the method is Object... message. In most cases it seems the message isn't processed and toString() is invoked on the object array resulting in a message that is not useful.

Example output:

org.opentest4j.AssertionFailedError: [Ljava.lang.Object;@221c097f ==> expected: <true> but was: <false>

There is already a method within the JAXRSCommonClient which converts the object array into a string message.

[jamezp]

This PR has been merged. I'm closing this issue for that reason.