Testing improvements (#4863)

* Adds supports-color so spec reporter dont output colors when not supported

* Adds babelrc so breakpoints dont jump around in specs

* Rename test to avoid duplicated name

* Removes unused methods

* Better naming for it_exclude

src/Adapters/Storage/StorageAdapter.js

@@ -31,7 +31,6 @@ export interface StorageAdapter {
   createClass(className: string, schema: SchemaType): Promise<void>;
   addFieldIfNotExists(className: string, fieldName: string, type: any): Promise<void>;
   deleteClass(className: string): Promise<void>;
-  deleteAllClasses(): Promise<void>;
   dropDatabase(): Promise<void>;
   deleteFields(className: string, schema: SchemaType, fieldNames: Array<string>): Promise<void>;
   getAllClasses(): Promise<StorageClass[]>;