[DockerImageScanner] Add custom namespace for DTR images

RE-652

Change-Id: I4b785849310668060e351e76f2c3f862ae8df126
diff --git a/src/com/mirantis/mk/DockerImageScanner.groovy b/src/com/mirantis/mk/DockerImageScanner.groovy
index aeb162f..64817a8 100644
--- a/src/com/mirantis/mk/DockerImageScanner.groovy
+++ b/src/com/mirantis/mk/DockerImageScanner.groovy
@@ -227,6 +227,8 @@
                 return
             } else if (image_key.startsWith('mirantis/ucp') || image_key.startsWith('mirantiseng/ucp')) {
                 jiraNamespace = 'ENGORC'
+            } else if (image_key.startsWith('mirantis/dtr') || image_key.startsWith('mirantiseng/dtr')) {
+                jiraNamespace = 'ENGDTR'
             } else {
                 jiraNamespace = 'PRODX'
             }