RFR: JDK-8263188: JSSE should fail fast if there isn't supported signature algorithm [v2]

[John Jiang]

> If signature_algorithms extension is present, but the algorithms are unreconginzed or unsupported, JSSE peers should send fatal alert immediately.
> For example, in this case, it's unnecssary to try to produce ServerHello, Certificate and ServerKeyExchange messages.

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

  TLSv1.2 CertificateRequest could fail fast if no common signature scheme and add two tests for TLSv1.2 and TLSv1.3 respectively

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/2876/files
  - new: https://git.openjdk.java.net/jdk/pull/2876/files/bed8a7b7..a0552d45

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=2876&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=2876&range=00-01

  Stats: 485 lines in 5 files changed: 473 ins; 0 del; 12 mod
  Patch: https://git.openjdk.java.net/jdk/pull/2876.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/2876/head:pull/2876

PR: https://git.openjdk.java.net/jdk/pull/2876