[crac] RFR: Reset JVM start time and up time on restore (CRaCResetStartTime flag)

[Roman Marchenko]

This change adds an opportunity reset both JVM's start time and uptime on restoring.

Resetting time may be performed with the new flag "-XX:+CRaCResetStartTime".

The flag is 'false' by default.

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

Commit messages:
 - Reset JVM start time and up time on restore (CRaCResetStartTime flag)

Changes: https://git.openjdk.org/crac/pull/130/files
 Webrev: https://webrevs.openjdk.org/?repo=crac&pr=130&range=00
  Stats: 96 lines in 6 files changed: 96 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/crac/pull/130.diff
  Fetch: git fetch https://git.openjdk.org/crac.git pull/130/head:pull/130

PR: https://git.openjdk.org/crac/pull/130