parameter descriptions for JDBC related providers

Change-Id: I848de3fc8d3a62a741c1b3adb62d10f311c189aa
Reviewed-on: http://gerrit.esdi-community.eu/3119
Tested-by: Jenkins <sitemple@igd.fraunhofer.de>
Reviewed-by: Simon Templer <simon.templer@igd.fraunhofer.de>