RFR: 8267935: Replace BasicHashtable and Hashtable

[Afshin Zafari]

### Description
Hashtable class to be replaced with ResourceHashtable class in all source code.

### Patch 
The only instance was `#include "hashtable.hpp"` in `jvmtiTagMapTable.cpp` and removed.
The corresponding files (`hashtable.hpp`, `hashtable.inline.hpp` and `hashtable.cpp`) are removed too.

### Test
mach5 tier1 all platforms.

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

Commit messages:
 - 8267935: Replace BasicHashtable and Hashtable

Changes: https://git.openjdk.org/jdk/pull/12275/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=12275&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8267935
  Stats: 596 lines in 4 files changed: 0 ins; 596 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/12275.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/12275/head:pull/12275

PR: https://git.openjdk.org/jdk/pull/12275