test: update optimization setting for integration tests (#1250)

Update tests to reflect latest project configuration

See: angular/angular-cli#15651

Author: alan-agius4

integration/express-engine-ivy/angular.json

@@ -155,10 +155,7 @@
                 }
               ],
               "sourceMap": false,
-              "optimization": {
-                "scripts": false,
-                "styles": true
-              }
+              "optimization": true
             }
           }
         }

integration/express-engine-ve/angular.json

@@ -155,10 +155,7 @@
                 }
               ],
               "sourceMap": false,
-              "optimization": {
-                "scripts": false,
-                "styles": true
-              }
+              "optimization": true
             }
           }
         }

integration/hapi-engine-ivy/angular.json

@@ -155,10 +155,7 @@
                 }
               ],
               "sourceMap": false,
-              "optimization": {
-                "scripts": false,
-                "styles": true
-              }
+              "optimization": true
             }
           }
         }

integration/hapi-engine-ve/angular.json

@@ -155,10 +155,7 @@
                 }
               ],
               "sourceMap": false,
-              "optimization": {
-                "scripts": false,
-                "styles": true
-              }
+              "optimization": true
             }
           }
         }