Fixed `ng test` failed tests, due to errors:

[alundiak]

• "If 'router-outlet' is an Angular component, then verify that it is part of this module"
• "If 'router-outlet' is a Web Component then add 'CUSTOM_ELEMENTS_SCHEMA' to the '@NgModule.schemas'"
• "Error: StaticInjectorError(DynamicTestModule)[ApiService -> HttpClient]"
• "StaticInjectorError(DynamicTestModule)[HttpClient -> HttpHandler]"
• "Can't bind to 'routerLink' since it isn't a known property of 'a'"
• "Can't bind to 'formGroup' since it isn't a known property of 'form'"
• "Can't bind to 'errorStateMatcher' since it isn't a known property of 'input'"
• "Can't bind to 'dataSource' since it isn't a known property of 'table'"
• "Error: StaticInjectorError(DynamicTestModule)[RouterLinkWithHref -> Router]"
• "No provider for ControlContainer"

Those errors were faced during ng test, and fixed step by step for every it(). Code changes verified with:

• Node v10.8.0,
• npm v6.2.0,
• Angular Core v6.0.2,
• Angular Material v6.0.2,
• Angular Forms v6.0.2 and
• Angualr CLI v6.0.0 (also with globally installed Angular CLI 6.1.2)
• Also tested code with Angular v6.1.1 but I will create separate PR for that changes.

Related to issue #5

[alundiak]

up :)