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/InstallationsRouter.spec.js

@@ -3,10 +3,9 @@ var Config = require('../src/Config');
 var rest = require('../src/rest');
 var InstallationsRouter = require('../src/Routers/InstallationsRouter').InstallationsRouter;
 
-var config = new Config('test');
-
-describe_only_db(['mongo'])('InstallationsRouter', () => {
+describe('InstallationsRouter', () => {
   it('uses find condition from request.body', (done) => {
+    var config = new Config('test');
     var androidDeviceRequest = {
       'installationId': '12345678-abcd-abcd-abcd-123456789abc',
       'deviceType': 'android'
@@ -37,10 +36,14 @@ describe_only_db(['mongo'])('InstallationsRouter', () => {
       var results = res.response.results;
       expect(results.length).toEqual(1);
       done();
+    }).catch((err) => {
+      fail(JSON.stringify(err));
+      done();
     });
   });
 
   it('uses find condition from request.query', (done) => {
+    var config = new Config('test');
     var androidDeviceRequest = {
       'installationId': '12345678-abcd-abcd-abcd-123456789abc',
       'deviceType': 'android'
@@ -72,12 +75,14 @@ describe_only_db(['mongo'])('InstallationsRouter', () => {
       expect(results.length).toEqual(1);
       done();
     }).catch((err) => {
+      console.error(err);
       fail(JSON.stringify(err));
       done();
     });
   });
 
   it('query installations with limit = 0', (done) => {
+    var config = new Config('test');
     var androidDeviceRequest = {
       'installationId': '12345678-abcd-abcd-abcd-123456789abc',
       'deviceType': 'android'
@@ -96,6 +101,7 @@ describe_only_db(['mongo'])('InstallationsRouter', () => {
       info: {}
     };
 
+    var config = new Config('test');
     var router = new InstallationsRouter();
     rest.create(config, auth.nobody(config), '_Installation', androidDeviceRequest)
         .then(() => {
@@ -106,10 +112,14 @@ describe_only_db(['mongo'])('InstallationsRouter', () => {
       var response = res.response;
       expect(response.results.length).toEqual(0);
       done();
+    }).catch((err) => {
+      fail(JSON.stringify(err));
+      done();
     });
   });
 
   it('query installations with count = 1', done => {
+    var config = new Config('test');
     var androidDeviceRequest = {
       'installationId': '12345678-abcd-abcd-abcd-123456789abc',
       'deviceType': 'android'
@@ -145,6 +155,7 @@ describe_only_db(['mongo'])('InstallationsRouter', () => {
   });
 
   it('query installations with limit = 0 and count = 1', (done) => {
+    var config = new Config('test');
     var androidDeviceRequest = {
       'installationId': '12345678-abcd-abcd-abcd-123456789abc',
       'deviceType': 'android'