feat: add loan action button (#874)

- add prepay loan action
- add repayment loan action

Fixes: #243
Fixes: #242

src/app/loans/loans-view/loan-account-actions/prepay-loan/prepay-loan.component.spec.ts

@@ -0,0 +1,25 @@
+import { async, ComponentFixture, TestBed } from '@angular/core/testing';
+
+import { PrepayLoanComponent } from './prepay-loan.component';
+
+describe('PrepayLoanComponent', () => {
+  let component: PrepayLoanComponent;
+  let fixture: ComponentFixture<PrepayLoanComponent>;
+
+  beforeEach(async(() => {
+    TestBed.configureTestingModule({
+      declarations: [ PrepayLoanComponent ]
+    })
+    .compileComponents();
+  }));
+
+  beforeEach(() => {
+    fixture = TestBed.createComponent(PrepayLoanComponent);
+    component = fixture.componentInstance;
+    fixture.detectChanges();
+  });
+
+  it('should create', () => {
+    expect(component).toBeTruthy();
+  });
+});