build: Replace Codelyzer and TSLint with Angular ESLint

Migrate from the deprecated TSLint to Angluar ESLint. Also fix current
linting issues in the code, in particular:

- Use strict equals operators (=== and !==)
- Remove empty lifecycle methods (mostly ngOnInit)
- Output bindings including aliases should not be named as standard dom
  events (submit)
- Async pipe results should not be negated

src/app/savings/gsim-account/create-gsim-account/create-gsim-account.component.html

@@ -67,7 +67,7 @@
           [savingsAccountTemplate]="savingsAccountTemplate"
           [savingsAccountTermsForm]="savingsAccountTermsForm"
           [savingsAccount]="savingsAccount"
-          (submit)="submit()"
+          (submitEvent)="submit()"
         >
         </mifosx-savings-account-preview-step>
 

src/app/savings/gsim-account/create-gsim-account/create-gsim-account.component.ts

@@ -1,5 +1,5 @@
 /** Angular Imports */
-import { Component, OnInit, ViewChild } from '@angular/core';
+import { Component, ViewChild } from '@angular/core';
 import { Router, ActivatedRoute } from '@angular/router';
 
 /** Custom Components */
@@ -21,7 +21,7 @@ import { Dates } from 'app/core/utils/dates';
   styleUrls: ['./create-gsim-account.component.scss']
 })
 
-export class CreateGsimAccountComponent implements OnInit {
+export class CreateGsimAccountComponent {
 
   /** Savings Account Template */
   savingsAccountTemplate: any;
@@ -59,9 +59,6 @@ export class CreateGsimAccountComponent implements OnInit {
     });
   }
 
-  ngOnInit(): void {
-  }
-
   /**
    * Sets savings account product template.
    * @param {any} $event API response