create Data Source
fun createDataSource(dbServerName: String = "localhost", dbName: String, user: String = "", pWord: String = "", portNumber: Int = 5432): DataSource
Return
the DataSource for getting connections
Parameters
db Server Name
the name of the database server, must not be null
db Name
the name of the database, must not be null
user
the user
p Word
the password
port Number
a valid port number