Cleanup dependencyManagement overrides

This patch gets rid of a few warnings coming from overriding version
specified in parent dependencyManagement section.

Change-Id: Ida9662498bd152cc91954dc1843045c0553164ba
Signed-off-by: Robert Varga <rovarga@cisco.com>
Eliminate superfluous pluginManagement section

This structure is a recipe for a warning: jacoco.version is specified in
a parent pom, so there is no use specifying it in the pluginManagement
section here. Rather move it to the parent -- where it belongs.

Change-Id: Iadc84620ad69cccd681b9898ab87459520daafd5
Signed-off-by: Robert Varga <rovarga@cisco.com>
Merge "Cleanup dependencyManagement overrides"
Merge "Eliminate superfluous pluginManagement section"