feat(logger): Add log level configuration (#1451)

Author: bcaudan

lib/config.ts

@@ -517,6 +517,13 @@ export interface Config {
    */
   highlightDelay?: number;
 
+  /**
+   * Protractor log level [ERROR, WARN, INFO, DEBUG]
+   *
+   * default: INFO
+   */
+  logLevel?: string;
+
   // ---------------------------------------------------------------------------
   // ----- The test framework
   // --------------------------------------------------

lib/logger.ts

@@ -54,6 +54,8 @@ export class Logger {
   static set(config: Config): void {
     if (config.troubleshoot) {
       Logger.logLevel = LogLevel.DEBUG;
+    } else if (config.logLevel) {
+      Logger.logLevel = (<any>LogLevel)[config.logLevel];
     }
   }