8156852: Convert JSON_test to Gtest
Summary: convert test from InternalVMTests to Gtest
Reviewed-by: kvn, kzhaldyb

8147012: Fix includes in internalVMTests.cpp
Reviewed-by: stefank, mgerdin

8144246: adding lots of directives via jcmd may produce OOM crash
Summary: Add a limit to the number of directives
Reviewed-by: kvn

8137167: JEP165: Compiler Control: Implementation task
Summary: Compiler Control JEP
Reviewed-by: roland, twisti, zmajo, simonis