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/RestQuery.spec.js

@@ -134,7 +134,7 @@ describe('rest query', () => {
     }).catch((error) => { console.log(error); });
   });
 
-  it_exclude_dbs(['postgres'])('query non-existent class when disabled client class creation', (done) => {
+  it('query non-existent class when disabled client class creation', (done) => {
     var customConfig = Object.assign({}, config, {allowClientClassCreation: false});
     rest.find(customConfig, auth.nobody(customConfig), 'ClientClassCreation', {})
       .then(() => {
@@ -148,7 +148,7 @@ describe('rest query', () => {
     });
   });
 
-  it_exclude_dbs(['postgres'])('query existent class when disabled client class creation', (done) => {
+  it('query existent class when disabled client class creation', (done) => {
     var customConfig = Object.assign({}, config, {allowClientClassCreation: false});
     config.database.loadSchema()
     .then(schema => schema.addClassIfNotExists('ClientClassCreation', {}))
@@ -201,7 +201,7 @@ describe('rest query', () => {
       });
       return Promise.all([p0, p1]);
     }).then(done).catch((err) => {
-      console.error(err);
+      jfail(err);
       fail('should not fail');
       done();
     })
@@ -221,7 +221,7 @@ describe('rest query', () => {
     });
   });
 
-  it_exclude_dbs(['postgres'])('query with limit = 0 and count = 1', (done) => {
+  it('query with limit = 0 and count = 1', (done) => {
     rest.create(config, nobody, 'TestObject', {foo: 'baz'}
     ).then(() => {
       return rest.create(config, nobody,