RFR: 8237014: Missing javadoc for jdk.jfr.Recording(Map

[Erik Gahlin]

Hi,

Could I have a review of this fix that add javadoc to the 
jdk.jfr.Recording(Map) method.

Webrev:
http://cr.openjdk.java.net/~egahlin/8237014/

Bug:
https://bugs.openjdk.java.net/browse/JDK-8237014

Testing:
test/jdk/jdk/jfr

Thanks
Erik