Even faster tests (#4868)

* Various improvements in test name / de-duplications

* Reverts to class by class deletion, introduced fast mode that just delete data for mongo

- Speeds up are incredible Executed 1695 of 1713 specs INCOMPLETE (18 PENDING) in 4 mins 19 secs.

* Adds documentation about the deleteEverything

spec/LoggerController.spec.js

@@ -2,7 +2,7 @@ const LoggerController = require('../lib/Controllers/LoggerController').LoggerCo
 const WinstonLoggerAdapter = require('../lib/Adapters/Logger/WinstonLoggerAdapter').WinstonLoggerAdapter;
 
 describe('LoggerController', () => {
-  it('can check process a query without throwing', (done) => {
+  it('can process an empty query without throwing', (done) => {
     // Make mock request
     const query = {};
 
@@ -37,7 +37,7 @@ describe('LoggerController', () => {
     done();
   });
 
-  it('can process a query without throwing', (done) => {
+  it('can process an ascending query without throwing', (done) => {
     // Make mock request
     const query = {
       from: "2016-01-01Z00:00:00",
@@ -58,7 +58,7 @@ describe('LoggerController', () => {
     done();
   });
 
-  it('can check process a query without throwing', (done) => {
+  it('can process a descending query without throwing', (done) => {
     // Make mock request
     const query = {
       from: "2016-01-01",