RFR: Support modular JAR file with JSON format module info

[Shi Jun Zhang]

Hi all,

http://cr.openjdk.java.net/~zhangshj/penrose/json_in_jar/webrev.01/

This patch adds support for JSON format module info file in modular JAR 
file, and such modular JAR file can be installed into module library.

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Regards,

Shi Jun Zhang