RFR: 8036019: Insufficient alternatives listed in some errors produced by the parser

[Aggelos Biboudis]

Adjusts the corresponding "expected-" errors for `argumentOpt`,  `typeArgumentsOpt` and `annotationValue`.

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Commit messages:
 - 8036019: Improve alternatives listed in some errors

Changes: https://git.openjdk.java.net/jdk/pull/7019/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=7019&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8036019
  Stats: 94 lines in 9 files changed: 87 ins; 0 del; 7 mod
  Patch: https://git.openjdk.java.net/jdk/pull/7019.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/7019/head:pull/7019

PR: https://git.openjdk.java.net/jdk/pull/7019