hg: jdk/jdk: 8215155: Remove get_insert() from concurrent hashtable and gtests

[gerard.ziemski at oracle.com]

Changeset: c024fcb88ede
Author:    gziemski
Date:      2019-01-10 11:16 -0600
URL:       http://hg.openjdk.java.net/jdk/jdk/rev/c024fcb88ede

8215155: Remove get_insert() from concurrent hashtable and gtests
Summary: Replaced get_insert() with get()/insert() in gtest, removed get_insert() API from cht implementation.
Reviewed-by: coleenp, rehn

! src/hotspot/share/utilities/concurrentHashTable.hpp
! src/hotspot/share/utilities/concurrentHashTable.inline.hpp
! test/hotspot/gtest/utilities/test_concurrentHashtable.cpp