[ADF-1723] LogService configuration (#2496)

* log levels implementation

* documentation and test

* remove logservieMock

* add logLevel in app config file

* remove semicolons

* fix pagination test

* fix test form

* silent test in production config

* fix test

ng2-components/ng2-alfresco-core/src/components/pagination/pagination.component.spec.ts

@@ -20,6 +20,7 @@ import { async, ComponentFixture, TestBed } from '@angular/core/testing';
 import { HttpModule } from '@angular/http';
 import { TranslateLoader, TranslateModule } from '@ngx-translate/core';
 import { MaterialModule } from '../../material.module';
+import { AppConfigService } from '../../services/app-config.service';
 import { LogService } from '../../services/log.service';
 import { AlfrescoTranslateLoader } from '../../services/translate-loader.service';
 import { TranslationService } from '../../services/translation.service';
@@ -69,7 +70,8 @@ describe('PaginationComponent', () => {
             ],
             providers: [
                 TranslationService,
-                LogService
+                LogService,
+                AppConfigService
             ],
             schemas: [ NO_ERRORS_SCHEMA ]
         }).compileComponents()