The Spanner documentation test fails

[murgatroid99]

Environment details

• OS: Ubuntu
• Node.js version: 7.6.0
• npm version: 4.1.2
• google-cloud-node version: HEAD

Steps to reproduce

1. git clone
2. npm install
3. npm test

When I run it I get this error

commonGrpc.Service.encodeValue_ is not a function
  TypeError: commonGrpc.Service.encodeValue_ is not a function
      at Object.encode (packages/spanner/src/codec.js:177:42)
      at Database.runStream (packages/spanner/src/database.js:603:28)
      at Database.run (packages/spanner/src/database.js:490:8)
      at Database.wrapper [as run] (packages/spanner/node_modules/@google-cloud/common/src/util.js:705:29)
      at assert-code.vm:52:10
      at ContextifyScript.Script.runInContext (vm.js:32:29)
      at ContextifyScript.Script.runInNewContext (vm.js:38:15)
      at Object.exports.runInNewContext (vm.js:69:17)
      at runCodeInSandbox (test/docs.js:293:8)
      at Context.<anonymous> (test/docs.js:194:13)

[stephenplusplus]

Fixing now, sorry about that!

[stephenplusplus]

Fixed in this commit: 7fb4614 -- I had to restore the encodeValue_ method and publish it under @google-cloud/common-grpc@0.2.1.