Regression: Fix defaultFields for null values

[sampaiodiego]

Proposed changes

I'm proposing the following changes:

• support null as options on models (see logs below)
• do not change options object as they are passed as reference
• fix cases in Raw Models where it were mixing both fields and projection options, in this case mongodb driver gives preference to the latter, possibly causing issues by not returning desired fields.

Issue(s)

How to test or reproduce

Screenshots

Types of changes

• Bugfix (non-breaking change which fixes an issue)
• Improvement (non-breaking change which improves a current function)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Hotfix (a major bugfix that has to be merged asap)
• Documentation Update (if none of the other choices apply)

Checklist

• I have read the CONTRIBUTING doc
• I have signed the CLA
• Lint and unit tests pass locally with my changes
• I have added tests that prove my fix is effective or that my feature works (if applicable)
• I have added necessary documentation (if applicable)
• Any dependent changes have been merged and published in downstream modules

Changelog

Further comments

This particular case was forcing options to be null, causing the following error:

I20200722-11:37:06.974(-3)? Exception while invoking method 'login' TypeError: Cannot set property 'fields' of null
I20200722-11:37:06.974(-3)?     at UsersRaw._ensureDefaultFields (app/models/server/raw/BaseRaw.js:8:4)
I20200722-11:37:06.974(-3)?     at UsersRaw.findOne (app/models/server/raw/BaseRaw.js:17:8)
I20200722-11:37:06.974(-3)?     at UsersRaw.findOneByUsername (app/models/server/raw/Users.js:25:15)
I20200722-11:37:06.974(-3)?     at app/authentication/server/lib/restrictLoginAttempts.ts:54:41
I20200722-11:37:06.975(-3)?     at /Users/diegosampaio/.meteor/packages/promise/.0.11.2.1xavwef.9sbp++os+web.browser+web.browser.legacy+web.cordova/npm/node_modules/meteor-promise/fiber_pool.js:43:40
I20200722-11:37:06.975(-3)?  => awaited here:
I20200722-11:37:06.975(-3)?     at Function.Promise.await (/Users/diegosampaio/.meteor/packages/promise/.0.11.2.1xavwef.9sbp++os+web.browser+web.browser.legacy+web.cordova/npm/node_modules/meteor-promise/promise_server.js:56:12)
I20200722-11:37:06.975(-3)?     at app/authentication/server/startup/index.js:306:15
I20200722-11:37:06.975(-3)?     at packages/callback-hook/hook.js:131:22
I20200722-11:37:06.975(-3)?     at packages/accounts-base/accounts_server.js:154:15
I20200722-11:37:06.975(-3)?     at Hook.each (packages/callback-hook/hook.js:109:15)
I20200722-11:37:06.975(-3)?     at AccountsServer._validateLogin (packages/accounts-base/accounts_server.js:151:29)
I20200722-11:37:06.975(-3)?     at AccountsServer._attemptLogin (packages/accounts-base/accounts_server.js:340:10)
I20200722-11:37:06.976(-3)?     at MethodInvocation.methods.login (packages/accounts-base/accounts_server.js:522:23)
I20200722-11:37:06.976(-3)?     at maybeAuditArgumentChecks (packages/ddp-server/livedata_server.js:1771:12)
I20200722-11:37:06.976(-3)?     at packages/ddp-server/livedata_server.js:719:19
I20200722-11:37:06.976(-3)?     at Meteor.EnvironmentVariable.EVp.withValue (packages/meteor.js:1234:12)
I20200722-11:37:06.976(-3)?     at packages/ddp-server/livedata_server.js:717:46
I20200722-11:37:06.976(-3)?     at Meteor.EnvironmentVariable.EVp.withValue (packages/meteor.js:1234:12)
I20200722-11:37:06.976(-3)?     at packages/ddp-server/livedata_server.js:715:46
I20200722-11:37:06.976(-3)?     at new Promise (<anonymous>)
I20200722-11:37:06.976(-3)?     at Session.method (packages/ddp-server/livedata_server.js:689:23)
I20200722-11:37:06.976(-3)?     at packages/ddp-server/livedata_server.js:559:43