FIX-MISSING-FILE: Cannot read property 'ns' of null - when missing proto/json files

[cblair]

Problem

When trying to load proto files, if the path is not found, grpc dies in a non-obvious way:

TypeError: Cannot read property 'ns' of null
      at Object.load (node_modules/grpc/index.js:146:28)
      at loadRpcService (node_modules/@communityco/platform-helpers/lib/service/utils/grpc.js:42:22)
      at createRpcClient (node_modules/@communityco/platform-helpers/lib/service/utils/grpc.js:60:19)
      at createClient (node_modules/@communityco/platform-helpers/lib/service/index.js:55:22)
      at Context.before (test/profiles.component.test.js:58:14)

Synopsis

This is due to some fault intolerant code when making an internal builder object:

grpc-node/packages/grpc-native-core/index.js

Line 146 in 0e10540

return loadObject(builder.ns, options);

try {
    switch(format) {
      case 'proto':
      builder = ProtoBuf.loadProtoFile(filename);
      break;
      case 'json':
      builder = ProtoBuf.loadJsonFile(filename);
      break;
      default:
      throw new Error('Unrecognized format "' + format + '"');
    }
  } finally {
    ProtoBuf.convertFieldsToCamelCase = convertFieldsToCamelCaseOriginal;
  }
  return loadObject(builder.ns, options);

Expected Behavior

In the case in which a file cannot be found, throw an exception indicating so.

Simple fix, PR WIP.