hawkBit rest docs (management & DDI API) (#688)

* hawkBit REST docs.

Signed-off-by: kaizimmerm <kai.zimmermann@bosch-si.com>

* Fiy gitignore.

Signed-off-by: kaizimmerm <kai.zimmermann@bosch-si.com>

* Add to website.

Signed-off-by: kaizimmerm <kai.zimmermann@bosch-si.com>

* Switch to generated docs.

Signed-off-by: kaizimmerm <kai.zimmermann@bosch-si.com>

* Fix typos.

Signed-off-by: kaizimmerm <kai.zimmermann@bosch-si.com>

* Review findings.

Signed-off-by: kaizimmerm <kai.zimmermann@bosch-si.com>

* Otimizations.

Signed-off-by: kaizimmerm <kai.zimmermann@bosch-si.com>

* Revert accidental checkin.

Signed-off-by: kaizimmerm <kai.zimmermann@bosch-si.com>

* Add security link.

hawkbit-ui/src/main/java/org/eclipse/hawkbit/ui/filtermanagement/footer/TargetFilterCountMessageLabel.java

@@ -25,8 +25,6 @@ import com.vaadin.ui.Label;
 import com.vaadin.ui.UI;
 
 /**
- * @author Venugopal Boodidadinne(RBEI/BSJ)
- * 
  *         Count message label which display current filter details and details
  *         on pinning.
  */