RFR JDK-8012645(2nd round): Stream methods on BitSet, Random, ThreadLocalRandom, ZipFile

[Henry Jen]

Hi,

Adapt feedback from the first round, updated webrev and specdiff can be
found at:

http://cr.openjdk.java.net/~henryjen/ccc/8012645.1/webrev
http://cr.openjdk.java.net/~henryjen/ccc/8012645.1/specdiff

Summary of change,
1. Javadoc change for ZipFile::stream
2. A inner class implements Enumeration and Iterator for
ZipEntry/JarEntry, and the stream is now not order-significant.
3. Added test case for close ZipFile and JarFile to throw
IllegalStateException.

Cheers,
Henry