*BREAKING CHANGE* feature(http): request path interceptors

[emoralesb05]

Description

#194
Path interceptors for http module. There is a need for intercepting certain paths instead of every single request done by the HttpInterceptorService

What's included?

• code-health unit test for HttpInterceptorService
• A way to configure interceptors to a specific path they should intercept.

Before:

CovalentHttpModule.forRoot([Interceptor1, Interceptor2]),

After:

CovalentHttpModule.forRoot({
      interceptors: [{
          interceptor: Interceptor1,
          paths: ['**'],
        }, {
          interceptor: Interceptor2,
          paths: ['/apps/*/jobs**', '/logs']
        }],
    }),

• Updated docs with examples.
• Updated README.md

Test Steps

• ng serve
• ng test

[emoralesb05]

• Changed http.module to be AoT friendly (closes Integration issue. Error encountered resolving symbol values statically #195)

New setup:

const httpInterceptorProviders: Type<IHttpInterceptor>[] = [
  CustomInterceptor,
  ...
];

@NgModule({
  imports: [
    HttpModule, /* or CovalentCoreModule.forRoot() */
    CovalentHttpModule.forRoot({
      interceptors: [{
        interceptor: CustomInterceptor, paths: ['**'],
      }],
    }),
    ...
  ],
  providers: [
    httpInterceptorProviders,
    ...
  ],
  ...
})
export class MyModule {}