Fix for endless loop when an exception of type EntityAlreadyExistsException is thrown in the context of the retryable findOrRegisterTargetIfItDoesNotExist method (#828)

* fixed typo in method name

Signed-off-by: Ahmed Sayed <ahmed.sayed@bosch-si.com>

* Added recover method to handle EntityAlreadyExistsException

Signed-off-by: Ahmed Sayed <ahmed.sayed@bosch-si.com>

* Added tests

Signed-off-by: Ahmed Sayed <ahmed.sayed@bosch-si.com>

* Apply suggestions from code review

Use thenThrow(Exception.class) instead of (new Exception())

Co-Authored-By: a-sayyed <ahmed.sayed@bosch-si.com>

* Apply suggestions from code review

use final modifier

Co-Authored-By: a-sayyed <ahmed.sayed@bosch-si.com>

* Adapted review findings

Signed-off-by: Ahmed Sayed <ahmed.sayed@bosch-si.com>

* Adapted review findings

Signed-off-by: Ahmed Sayed <ahmed.sayed@bosch-si.com>

* added logs for EntityAlreadyExistsException case

Signed-off-by: Ahmed Sayed <ahmed.sayed@bosch-si.com>

hawkbit-repository/hawkbit-repository-api/src/main/java/org/eclipse/hawkbit/repository/ControllerManagement.java

@@ -192,7 +192,7 @@ public interface ControllerManagement {
      * @return target reference
      */
     @PreAuthorize(SpringEvalExpressions.IS_CONTROLLER)
-    Target findOrRegisterTargetIfItDoesNotexist(@NotEmpty String controllerId, @NotNull URI address);
+    Target findOrRegisterTargetIfItDoesNotExist(@NotEmpty String controllerId, @NotNull URI address);
 
     /**
      * Retrieves last {@link Action} for a download of an artifact of given