[11u] RFR (S): 8226880: Backport of JDK-8208698 (Improved ECC Implementation) should not bring parts of JDK-8205476 (KeyAgreement#generateSecret is not reset for ECDH based algorithm)

[Langer, Christoph]

Hi,

I made a mistake when bringing JDK-8226880 to 11u. The patch introduced coding 
of JDK-8205476 that should not be there. Here is a patch to fix this.

Bug: https://bugs.openjdk.java.net/browse/JDK-8226880
Webrev: http://cr.openjdk.java.net/~clanger/webrevs/8226880.11u.0/

As the backport is in 11.0.4, this fix needs to be applied there during closed 
rampdown.

Thanks
Christoph