RFR: 8281631: HashMap copy constructor and putAll can over-allocate table [v12]

[XenoAmess]

> 8281631: HashMap copy constructor and putAll can over-allocate table

XenoAmess has updated the pull request incrementally with one additional commit since the last revision:

  fix test

-------------

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/7431/files
  - new: https://git.openjdk.java.net/jdk/pull/7431/files/f37f8d2a..b191bd6a

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=7431&range=11
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=7431&range=10-11

  Stats: 2 lines in 1 file changed: 1 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/7431.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/7431/head:pull/7431

PR: https://git.openjdk.java.net/jdk/pull/7431