Can't update Java App Engine component with already installed gcloud command

[mizo0203]

In which file did you encounter the issue?

setup_tests.sh

Did you change the file? If so, how?

No

Describe the issue

Ref: https://travis-ci.org/GoogleCloudPlatform/appengine-try-java/builds/291636624#L477

$ sudo ./setup_tests.sh
You cannot perform this action because this Cloud SDK installation is 
managed by an external package manager.  If you would like to get the 
latest version, please see our main download page at:
  
https://cloud.google.com/sdk/
ERROR: (gcloud.components.update) The component manager is disabled for this installation