Document connection string details

[martindsouza]

Feedback from @vincentmorneau that we should provided better information of how a connection string is generated. i.e. break down giffy/giffy@localhost:11521/xe.

[zhudock]

Name	Description	Example
connectionDetails	The connect string to connect to a database using sqlcl on the command line. Note: A password is required at this stage.	- hr/hr@//server:port/service_name - hr/hr@//server:port:sid - hr/hr@XE1