Feature hawkbit uaa extension (#317)

* use UserPrincipal to determine tenant at runtime

Signed-off-by: Michael Hirsch <michael.hirsch@bosch-si.com>

* add hawkbit-uaa extension

Signed-off-by: Michael Hirsch <michael.hirsch@bosch-si.com>

* adapt WithSpringAuthorityRule with UserPrincipal for determine tenant

Signed-off-by: Michael Hirsch <michael.hirsch@bosch-si.com>

* fix String principal in DDI download resource

Signed-off-by: Michael Hirsch <michael.hirsch@bosch-si.com>

* merge the email to the UserPrincipal from the master manually

Signed-off-by: Michael Hirsch <michael.hirsch@bosch-si.com>

* Fixed some grammar issues and typos

Signed-off-by: Dominic Schabel <dominic.schabel@bosch-si.com>

hawkbit-ddi-dl-api/src/main/java/org/eclipse/hawkbit/ddi/dl/rest/api/DdiDlArtifactStoreControllerRestApi.java

@@ -32,8 +32,8 @@ public interface DdiDlArtifactStoreControllerRestApi {
      *            name of the client
      * @param fileName
      *            to search for
-     * @param targetid
-     *            of authenticated target
+     * @param principal
+     *            the authentication principal stored in the security context
      *
      * @return response of the servlet which in case of success is status code
      *         {@link HttpStatus#OK} or in case of partial download
@@ -43,7 +43,7 @@ public interface DdiDlArtifactStoreControllerRestApi {
             + "/{fileName}")
     @ResponseBody
     ResponseEntity<InputStream> downloadArtifactByFilename(@PathVariable("tenant") final String tenant,
-            @PathVariable("fileName") final String fileName, @AuthenticationPrincipal final String targetid);
+            @PathVariable("fileName") final String fileName, @AuthenticationPrincipal final Object principal);
 
     /**
      * Handles GET MD5 checksum file download request.