refactor: refactored the code and removed the code smells

refactored the code and removed the code smells

(cherry picked from commit d526970)

Author: alkavats1

packages/angular_devkit/build_angular/test/hello-world-app/src/test.ts

@@ -30,4 +30,4 @@ getTestBed().initTestEnvironment(
 // Then we find all the tests.
 const context = require.context('./', true, /\.spec\.ts$/);
 // And load the modules.
-context.keys().map(context);
+context.keys().forEach(context);

packages/angular_devkit/build_angular/test/hello-world-lib/projects/lib/src/test.ts

@@ -31,4 +31,4 @@ getTestBed().initTestEnvironment(
 // Then we find all the tests.
 const context = require.context('./', true, /\.spec\.ts$/);
 // And load the modules.
-context.keys().map(context);
+context.keys().forEach(context);

packages/schematics/angular/application/files/src/test.ts.template

@@ -23,4 +23,4 @@ getTestBed().initTestEnvironment(
 // Then we find all the tests.
 const context = require.context('./', true, /\.spec\.ts$/);
 // And load the modules.
-context.keys().map(context);
+context.keys().forEach(context);

packages/schematics/angular/library/files/src/test.ts.template

@@ -24,4 +24,4 @@ getTestBed().initTestEnvironment(
 // Then we find all the tests.
 const context = require.context('./', true, /\.spec\.ts$/);
 // And load the modules.
-context.keys().map(context);
+context.keys().forEach(context);

tests/legacy-cli/e2e/assets/10.0-project/src/test.ts

@@ -23,4 +23,4 @@ getTestBed().initTestEnvironment(BrowserDynamicTestingModule, platformBrowserDyn
 // Then we find all the tests.
 const context = require.context('./', true, /\.spec\.ts$/);
 // And load the modules.
-context.keys().map(context);
+context.keys().forEach(context);