Added service method to create a new account with custom database
credentials. Needed to the WebUI.

Change-Id: I22d10f96d42621a085c20f7cc7c5e901acf5a213
Signed-off-by: Peter Merkert <p.merkert@sap.com>
Fixed name of parameter from db password to db port.

Change-Id: I728b01de5dee0820a022d747abf9937a918b00cc
Signed-off-by: Peter Merkert <p.merkert@sap.com>