RFR:JDK-8030864:Add an efficient getDateTimeMillis method to java.time

[nadeesh tv]

Hi all,

Please review an enhancement  for a  garbage free epochSecond method.

Bug ID: https://bugs.openjdk.java.net/browse/JDK-8030864 
<https://bugs.openjdk.java.net/browse/JDK-8030864>

webrev: http://cr.openjdk.java.net/~ntv/8030864/webrev.01 
<http://cr.openjdk.java.net/%7Entv/8030864/webrev.01>

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Thanks and Regards,
Nadeesh TV