Rename playbook for ad-hoc reporting box management

Though the name "tools-gp" is now a misnomer, a new on-call devops would
probably know the place where read-replica scripts live by that name.
Therefore, until the server is renamed, the playbook should match it.

playbooks/edx-east/ad_hoc_reporting.yml → playbooks/edx-east/tools-gp.yml

 # Creating a new ad hoc reporting box:
-# ansible-playbook -i 'reporting.example.com,' ./ad_hoc_reporting.yml -e@/var/path/common.yml -e@/vars/path/environnment-deployment.yml
+# ansible-playbook -i 'reporting.example.com,' ./tools-gp.yml -e@/var/path/common.yml -e@/vars/path/environnment-deployment.yml
 # Updating the users on an existing box:
-# ansible-playbook -i 'reporting.example.com,' ./ad_hoc_reporting.yml --tags users -e@/var/path/common.yml -e@/vars/path/environnment-deployment.yml
+# ansible-playbook -i 'reporting.example.com,' ./tools-gp.yml --tags users -e@/var/path/common.yml -e@/vars/path/environnment-deployment.yml
 - name: Deploy Ad Hoc Reporting Scripts 
   hosts: all
   sudo: True