RFR: JDK-8075816: AliasLevel is broken and should be deprecated [v2]

[Tobias Holenstein]

> Deprecated AliasLevel and edited help messages.
> Added flag to VMDeprecatedOptions test.
> 
> Checked that tests are not affected.

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

  Obsolete AliasLevel flag

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

Changes:
  - all: https://git.openjdk.java.net/jdk/pull/8140/files
  - new: https://git.openjdk.java.net/jdk/pull/8140/files/84412b89..6a1bed2d

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=8140&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=8140&range=00-01

  Stats: 77 lines in 12 files changed: 2 ins; 57 del; 18 mod
  Patch: https://git.openjdk.java.net/jdk/pull/8140.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/8140/head:pull/8140

PR: https://git.openjdk.java.net/jdk/pull/8140