Advancements with postgres (#2510)

* Start DB runner from tests

* Connect GridstoreAdapter only when needed

* removes unused package

* better test errors reporting

* Adds support for __op.Delete

* Better test error reporting

* Makes sure all tests can run without crashing

* Use xdescribe to skip test suite

* Removes unused dependencies

* Let volatiles classes be created with PG on start

* Do not fail if class dont exist

* adds index.spec.js to the pg suite

* Use a new config each test to prevent side effects

* Enable EmailVerificationToken specs with pg

* Makes sure failure output is not cut

* Reduces number of ignored tests in ParseObject.spec

* Inspect reconfiguration errors

* Mark GlobalConfig is incompatible with PG

- Problem is with nested updates (param.prop = value)

* PG: Nested JSON queries and updates

- Adds support for nested json and . operator queries
- Adds debug support for PG adapter
- Adds loglevel support in helper

* Enable working specs in ParseUser

* Sets default logLevel in tests to undefined

* Adds File type support, retores purchaseValidation specs

* Adds support for updating jsonb objects

- Restores PushController tests

* Proper implementation of deleteByQuery and ORs

- Adds ParseInstallation spec to the test suite

* xit only failing tests

* Nit on ParseAPI spec

* add sorting operator

* properly bound order keys

* reverts describe_only_db behavior

* Enables passing tests

* Adds basic support for relations, upsertOneObject aliased to createObject

* progress on queries options

* Fix ACL update related problems

* Creates relation tables on class creation

* Adds Relation tests

* remove flaky tests

* use promises instead of CB

* disable flaky test

* nits

* Fixes on schema spec

- Next thing is to implemenet geopoint and files correctly

* fix failues

* Basic GeoPoint support

* Adds support for $nearSphere/$maxDistance geopoint queries

* enable passing tests

* drop tables afterEach for PG, clean up relation tables too

* Better initialization/dropTables

spec/GridStoreAdapter.js

@@ -7,7 +7,7 @@ var FilesController = require('../src/Controllers/FilesController').default;
 
 
 // Small additional tests to improve overall coverage
-describe("GridStoreAdapter",() =>{
+describe_only_db('mongo')("GridStoreAdapter",() =>{
   it("should properly instanciate the GridStore when deleting a file", (done) => {
 
     var databaseURI = 'mongodb://localhost:27017/parse';