Fix test-image-custom-partitions integration test

Same fix as for the Tumbleweed test now also applied
to the Leap test. Patching of the new root device did
no longer apply

Author: schaefi

build-tests/x86/leap/test-image-custom-partitions/root/config_partids.patch

@@ -1,11 +1,11 @@
 --- /usr/lib/dracut/modules.d/90kiwi-repart/kiwi-repart-disk.sh
 +++ /usr/lib/dracut/modules.d/90kiwi-repart/kiwi-repart-disk.sh
-@@ -23,6 +23,8 @@ function initialize {
-     import_file ${profile}
-     import_file ${partition_ids}
+@@ -43,6 +43,8 @@ function initialize {
+     else
+         import_file ${partition_ids}
 
-+    export kiwi_RootPart=7
++        export kiwi_RootPart=7
 +
-     disk=$(lookup_disk_device_from_root)
-     export disk
- 
+         disk=$(lookup_disk_device_from_root)
+         export disk
+     fi