Add missing colon in config.json.
Endpoint correctly setup to return a response.

The function was missing the 'with_transaction_id' decorator, and the
cql call was missing an required empty dictionary.
Enable 'make mockrun' to actually run.

'make mockrun' fails when *scheduler* and *mock* is set in the config.
This is because the scheduler setup requires that *cassandra_cluster*
has been set before hand, and this does not happen when running with
'--mock'.
Mock model method for get_metrics.
Otter Admin Application Setup

- Service setup, and options very similar to base otter app.
- Make commands for running admin with and without a mock backend
- Import of the Klein app so that the routes are registered
- Base route '/' that returns nothing. Ability to verify service
  available, and may be changed later to return relevant data.