New entry added as an RST file with examples showing how to create and manage users and databases on Trove instances using Trove API. Change-Id: I565f3b4d7c215c9508de127f1781638531d6fb45 Signed-off-by: Dariusz Krol <dkrol3@gmail.com> Signed-off-by: Dariusz Krol <d.krol@samsung.com>