6962815: support enable and disable of the servicetag's system registry for testing purpose
Summary: Allow the system registry to be disabled/enabled at runtime
Reviewed-by: ksrini
^build/
^dist/
/nbproject/private/
^src/share/tools/hsdis/build/
^src/share/tools/IdealGraphVisualizer/[a-zA-Z0-9]*/build/
^src/share/tools/IdealGraphVisualizer/build/
^src/share/tools/IdealGraphVisualizer/dist/