Switch the AQS restbase use from 'cassandra' to 'aqs'
The aqs user has been created and tested, data is returned
correctly. The plan would be to:
- disable puppet on aqs100
- depool via conftool aqs1001
- run puppet on aqs1001 and test
- re-pool aqs1001 and check again
- do the same with aqs100
Changes for aqs100 will be a no-op.