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/RestCreate.spec.js

@@ -11,7 +11,7 @@ var config = new Config('test');
 let database = config.database;
 
 describe('rest create', () => {
-  it_exclude_dbs(['postgres'])('handles _id', done => {
+  it('handles _id', done => {
     rest.create(config, auth.nobody(config), 'Foo', {})
     .then(() => database.adapter.find('Foo', { fields: {} }, {}, {}))
     .then(results => {
@@ -23,7 +23,7 @@ describe('rest create', () => {
     });
   });
 
-  it_exclude_dbs(['postgres'])('handles array, object, date', (done) => {
+  it('handles array, object, date', (done) => {
     let now = new Date();
     var obj = {
       array: [1, 2, 3],
@@ -77,7 +77,7 @@ describe('rest create', () => {
     });
   });
 
-  it_exclude_dbs(['postgres'])('handles create on non-existent class when disabled client class creation', (done) => {
+  it('handles create on non-existent class when disabled client class creation', (done) => {
     var customConfig = Object.assign({}, config, {allowClientClassCreation: false});
     rest.create(customConfig, auth.nobody(customConfig), 'ClientClassCreation', {})
       .then(() => {
@@ -91,7 +91,7 @@ describe('rest create', () => {
     });
   });
 
-  it_exclude_dbs(['postgres'])('handles create on existent class when disabled client class creation', (done) => {
+  it('handles create on existent class when disabled client class creation', (done) => {
     var customConfig = Object.assign({}, config, {allowClientClassCreation: false});
     config.database.loadSchema()
     .then(schema => schema.addClassIfNotExists('ClientClassCreation', {}))
@@ -122,7 +122,7 @@ describe('rest create', () => {
       });
   });
 
-  it_exclude_dbs(['postgres'])('handles anonymous user signup', (done) => {
+  it('handles anonymous user signup', (done) => {
     var data1 = {
       authData: {
         anonymous: {
@@ -310,7 +310,7 @@ describe('rest create', () => {
     });
   });
 
-  it_exclude_dbs(['postgres'])("test default session length", (done) => {
+  it("test default session length", (done) => {
     var user = {
       username: 'asdf',
       password: 'zxcv',