RFR: 8273218: G1: Rename g1EvacuationInfo to g1EvacInfo [v3]

[Hamlin Li]

> This is a minor cleanup to rename g1EvacuationInfo to g1EvacInfo, as other similar files are named as EvacXxx.

Hamlin Li has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains three commits:

 - Merge
 - Fix include order.
 - Rename g1EvacuationInfo.hpp to g1EvacInfo.hpp, and related class names

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Changes: https://git.openjdk.java.net/jdk/pull/5325/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=5325&range=02
  Stats: 146 lines in 10 files changed: 1 ins; 107 del; 38 mod
  Patch: https://git.openjdk.java.net/jdk/pull/5325.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/5325/head:pull/5325

PR: https://git.openjdk.java.net/jdk/pull/5325