Update Node flags for v8.X instrumentation tests
Update Node flags for v8.X instrumentation tests

Added flags:
--expose-internals
--expose-http2

Included one edge case, where we have to remove http2 flag.

miguelb/raven-node,getsentry/raven-js,getsentry/raven-node,getsentry/raven-js,getsentry/raven-js,getsentry/raven-node,getsentry/raven-js,miguelb/raven-node