revert mongo changes

Author: cbaker6

spec/Idempotency.spec.js

@@ -12,6 +12,7 @@ describe('Idempotency', () => {
    runs only every 60s, so it can take up to 119s until entry removal - ain't nobody got time for that */
   const SIMULATE_TTL = true;
   const ttl = 2;
+  const maxTimeOut = 4000;
 
   // Helpers
   async function deleteRequestEntry(reqId) {
@@ -86,7 +87,7 @@ describe('Idempotency', () => {
     if (SIMULATE_TTL) {
       await deleteRequestEntry('abc-123');
     } else {
-      await new Promise(resolve => setTimeout(resolve, 10));
+      await new Promise(resolve => setTimeout(resolve, maxTimeOut));
     }
     await expectAsync(request(params)).toBeResolved();
     expect(counter).toBe(2);

src/Adapters/Storage/Mongo/MongoStorageAdapter.js

@@ -666,7 +666,6 @@ export class MongoStorageAdapter implements StorageAdapter {
     mongoFieldNames.forEach(fieldName => {
       indexCreationRequest[fieldName] = options.indexType !== undefined ? options.indexType : 1;
     });
-    const dropIndex = options.dropIndex !== undefined ? options.dropIndex : false;
     const defaultOptions: Object = { background: true, sparse: true };
     const indexNameOptions: Object = indexName ? { name: indexName } : {};
     const ttlOptions: Object = options.ttl !== undefined ? { expireAfterSeconds: options.ttl } : {};
@@ -679,13 +678,7 @@ export class MongoStorageAdapter implements StorageAdapter {
       ...indexNameOptions,
       ...ttlOptions,
     };
-    const promises = [];
-    if (dropIndex) {
-      const promise = this.dropIndex(className, indexName);
-      promises.push(promise);
-    }
-    return Promise.all(promises)
-      .then(() => this._adaptiveCollection(className))
+    return this._adaptiveCollection(className)
       .then(
         collection =>
           new Promise((resolve, reject) =>

src/Controllers/DatabaseController.js

@@ -1762,7 +1762,7 @@ class DatabaseController {
 
     const options = this.idempotencyOptions;
     if (this.adapter instanceof MongoStorageAdapter) {
-      options.dropIndex = false;
+      options.ttl = 0;
     } else if (this.adapter instanceof PostgresStorageAdapter) {
       options.setIdempodencyTrigger = true;
     }