7081804: Remove cause field from javax.xml.crypto.NoSuchMechnismException

[Sebastian Sickelmann]

Hi,

i have created a new webrev for the first raw version of the tests. It 
is avaiable here[1].

Why i put in some dumps and not the binary version of the files or 
byte[] in source?
   Because we cannot/should not integrate this testcase in jdk7 and so 
we cannot test backward-compatibility.
   So i want add some comments in the dumps to show and explain the 
difference.

Next steps:
     Expand to other Exceptions in javax/xml/crypto and comment the 
testsource better.


-- Sebastian

[1] 
http://oss-patches.24.eu/openjdk8/NoSuchMechanismException/REBASED_ON_85919cd409d1/