Provide a way to change the contextBpmRoot from the app.config file (#3144)

demo-shell/src/app.config.json

@@ -2,6 +2,7 @@
     "$schema": "../../lib/core/app-config/schema.json",
     "ecmHost": "http://{hostname}:{port}",
     "bpmHost": "http://{hostname}:{port}",
+    "contextRootBpm": "activiti-app",
     "application": {
         "name": "Alfresco ADF Application"
     },

lib/core/services/alfresco-api.service.ts

@@ -95,7 +95,8 @@ export class AlfrescoApiService {
             ticketBpm: this.storage.getItem('ticket-BPM'),
             hostEcm: this.appConfig.get<string>('ecmHost'),
             hostBpm: this.appConfig.get<string>('bpmHost'),
-            contextRoot: 'alfresco',
+            contextRootBpm: this.appConfig.get<string>('contextRootBpm'),
+            contextRoot: this.appConfig.get<string>('contextRootEcm'),
             disableCsrf: this.storage.getItem('DISABLE_CSRF') === 'true',
             oauth2: this.appConfig.get<any>('oauth2')
         });