Node.js SDK -- Upgrading gRPC Version

Upgrading the gRPC package version to 1.0.0 from
the outdated pre-release version, which causes
compilation failures on Windows. Adding the x509
package that aids with testing.

Change-Id: I62ae11c5a0bc32cb167fff77618e3fbe9ee14dbb
Signed-off-by: Anna D Derbakova <adderbak@us.ibm.com>