RFR: 8301117: Remove old_size param from ResizeableResourceHashtable::resize()

[Afshin Zafari]

`old_size` is removed from the function parameters in definitions and calls.
`table_size` is used as old size.
### Test
mach5 tiers 1-5.

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Commit messages:
 - 8301117: Remove old_size param from ResizeableResourceHashtable::resize()
 - 8301117: Remove old_size param from ResizeableResourceHashtable::resize()

Changes: https://git.openjdk.org/jdk/pull/12635/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=12635&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8301117
  Stats: 4 lines in 2 files changed: 0 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/jdk/pull/12635.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/12635/head:pull/12635

PR: https://git.openjdk.org/jdk/pull/12635