MSF_DATABASE_CONFIG scenario

MSP-11153
~/.msf4/database.yml scenario

MSP-11153
Remove unneeded command_line.yml

MSP-11153

Remove definition of command_line.yml in scenarios that don't use --yaml
flag.
Order database.yml definitions to match precedence

MSP-11153
Ensure a fake project database.yml is used for scenarios

MSP-11153

Ensures that cucumber still works if config/database.yml is not set and
so other location is being used to run cucumber.
Add 'the' to make steps read better

MSP-11153
Project "database.yml" scenario

MSP-11153
Add scenario for no database.yml

MSP-11153