[jdk11u-dev] RFR: 8309841: Jarsigner should print a warning if an entry is removed [v2]

[Roman Marchenko]

> This is backport of "8309841: Jarsigner should print a warning if an entry is removed"
> 
> Original patch does not apply cleanly to jdk11, some minor conflicts, and also in `test/jdk/sun/security/tools/jarsigner/RemovedFiles.java` `ed25519` algorithm was replaced with `RSA`, and `_` was replaced with a variable, and added the check at line 1259.
> 
> We need this fix in jdk11 and below, down to jdk8, as all versions have this issue with jarsigner.
> 
> New tests successfully ran locally on Linux, x86_64.

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

  Fixing review comments

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

Changes:
  - all: https://git.openjdk.org/jdk11u-dev/pull/3007/files
  - new: https://git.openjdk.org/jdk11u-dev/pull/3007/files/675ca9a0..49da1bb0

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=3007&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=3007&range=00-01

  Stats: 1 line in 1 file changed: 1 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/3007.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev.git pull/3007/head:pull/3007

PR: https://git.openjdk.org/jdk11u-dev/pull/3007