Bug 444609: Fixing remaining javadoc generation issues under jdk8

Signed-off-by: Petros Splinakis <petros.splinakis@oracle.com>

Review-by: Lukas J.
Bug #444609 - Javadoc compilation errors thrown when building using JDK8

Signed-off-by: Petros Splinakis <petros.splinakis@oracle.com>

Review-by: Lukas J.
Bug 447589: Fixing unit tests failing under SQL Server

Signed-off-by: Petros Splinakis <petros.splinakis@oracle.com>

Review-by: Lukas J.