Change /dbconsole to /h2-console

[ailiop]

(I am an absolute beginner to grails---just trying to get through the tutorial at the moment---so please excuse me if I am missing something.)

It appears that the /dbconsole URI has been replaced by /h2-console (see also https://docs.grails.org/4.0.1/guide/single.html#upgrading).

[ZacharyKlein]

@ailiop Thanks for the PR! It looks like the build failed because your Git identity isn't set up - this snippet is from the logs:

*** Please tell me who you are.
Run
  git config --global user.email "[email protected]"
  git config --global user.name "Your Name"
to set your account's default identity.
Omit --global to set the identity only in this repository.

If you can run those commands and push a new commit, I think that should get this taken care of. Thanks again for the submission!