CompilerControl: adding lots of directives via jcmd may produce OOM crash

#
# Out of Memory Error (/opt/jprt/T/P1/194749.amurillo/s/hotspot/src/share/vm/memory/allocation.inline.hpp:61), pid=8635, tid=48
#
# JRE version: Java(TM) SE Runtime Environment (9.0) (build 1.9.0-internal-fastdebug-20151127194749.amurillo.jdk9-hs-2015-11--b00)
# Java VM: Java HotSpot(TM) 64-Bit Server VM (1.9.0-internal-fastdebug-20151127194749.amurillo.jdk9-hs-2015-11--b00, mixed mode, tiered, compressed oops, parallel gc, solaris-amd64)
# Core dump will be written. Default location: /bpool/local/aurora/sandbox/results/workDir/compiler/compilercontrol/jcmd/StressAddMultiThreadedTest/core or core.8635

The test executes a lot of jcmd commands that add huge directive files