Fix pattern for check output on unzipFile

In this case we can't expect that the string ends with the specified appExt, string may contain several spaces and line break.

For example: 

<pre> 'Archive:  /var/folders/4w/nmpy2_2961v2tdpyp2ln0zzm0000gn/T/114014-95194-qetvmq/appium-app.zip\n
  inflating: usr/share/nginx/www/payload/someapp-2.0.apk  \n'
</pre>