Add mockEntireSchema: false to Apollo Server options to preserve existing resolvers

[NataliaTepluhina]

Fix for #69
With current implementation, if mocks are enabled, any existing resolvers will be overwritten. Adding a mockEntireSchema property to Apollo Server options allows to mock only missing resolvers.

Also fixed a name for plugin options: graphqlMock => enableMocks

[alphacentauri82]

Thank you, this was definitely a huge bug!

[yarnball]

Is this still an issue?

It keeps returning no values (or whatever is in db.json).

I have enabled mocking ("vue.config.js" has enableMocks: true), and ran the server with vue-cli-service apollo:start --mock

Please check below, have I setup my mocks wrong? I did read the docs

// mocks.js from the example project setup
export default {
  // Mock resolvers here
  Query: () => ({
	  Message: () => ({
	    text: 'Mocked Value',
	    id:123,
	  }),
  })
}