RFR: 8017513: Support for closeable streams

[Henry Jen]

Hi,

Please review webrev at
http://cr.openjdk.java.net/~henryjen/ccc/8017513/0/webrev/index.html

This webrev improve resource release experience on Streams by
eliminating CloseableStream, instead, fold close capability into Stream.

A new interface, java.util.MayHoldCloseableResource, indicates an
implementation may or may not hold a resource need to be closed.
Annotation {@link HoldsResource} may be used to guide users/static
analysis tools that a MHCR instance that definitely hold a Closeable
resource.

Cheers,
Henry