Batch transaction (#5849)

* Batch transaction boilerplate

* Refactoring transaction boilerplate

* Independent sessions test

* Transactions - partial

* Missing only one test

* All tests passing for mongo db

* Tests on Travis

* Transactions on postgres

* Fix travis to restart mongodb

* Remove mongodb service and keep only mongodb runner

* MongoDB service back

* Initialize replicaset

* Remove mongodb runner again

* Again only with mongodb-runner and removing cache

* Trying with pretest and posttest

* WiredTiger

* Pretest and posttest again

* Removing inexistent scripts

* wiredTiger

* One more attempt

* Trying another way to run mongodb-runner

* Fixing tests

* Include batch transaction on direct access

* Add tests to direct access

src/Adapters/Storage/StorageAdapter.js

@@ -46,30 +46,35 @@ export interface StorageAdapter {
   createObject(
     className: string,
     schema: SchemaType,
-    object: any
+    object: any,
+    transactionalSession: ?any
   ): Promise<any>;
   deleteObjectsByQuery(
     className: string,
     schema: SchemaType,
-    query: QueryType
+    query: QueryType,
+    transactionalSession: ?any
   ): Promise<void>;
   updateObjectsByQuery(
     className: string,
     schema: SchemaType,
     query: QueryType,
-    update: any
+    update: any,
+    transactionalSession: ?any
   ): Promise<[any]>;
   findOneAndUpdate(
     className: string,
     schema: SchemaType,
     query: QueryType,
-    update: any
+    update: any,
+    transactionalSession: ?any
   ): Promise<any>;
   upsertOneObject(
     className: string,
     schema: SchemaType,
     query: QueryType,
-    update: any
+    update: any,
+    transactionalSession: ?any
   ): Promise<any>;
   find(
     className: string,
@@ -114,4 +119,7 @@ export interface StorageAdapter {
     fields: any,
     conn: ?any
   ): Promise<void>;
+  createTransactionalSession(): Promise<any>;
+  commitTransactionalSession(transactionalSession: any): Promise<void>;
+  abortTransactionalSession(transactionalSession: any): Promise<void>;
 }