Set gRPC cipher suites sooner in node.js example.
Set gRPC cipher suites sooner in node.js example.

While here, also rename OpenSSL to BoringSSL since gRPC Core has
switched to that.

Fixes #429.

jrick/btcwallet,jrick/dcrwallet,jrick/btcwallet,jrick/dcrwallet,Stash-Crypto/btcwallet,btcsuite/btcwallet,Stash-Crypto/btcwallet,decred/dcrwallet,synrg-labs/btcwallet,Roasbeef/btcwallet,synrg-labs/btcwallet,decred/dcrwallet,btcsuite/btcwallet,Roasbeef/btcwallet