sandbox: switch to dynamic UUIDs

Migrate sandbox over to generating it's capsule update image GUIDs
dynamically from the namespace and board/image info. Update the
reference and tests to use the new GUIDs.

Acked-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
Signed-off-by: Caleb Connolly <caleb.connolly@linaro.org>
diff --git a/tools/binman/ftest.py b/tools/binman/ftest.py
index 93f3d22..2577c00 100644
--- a/tools/binman/ftest.py
+++ b/tools/binman/ftest.py
@@ -125,7 +125,7 @@
 # Firmware Management Protocol(FMP) GUID
 FW_MGMT_GUID = '6dcbd5ed-e82d-4c44-bda1-7194199ad92a'
 # Image GUID specified in the DTS
-CAPSULE_IMAGE_GUID = '09d7cf52-0720-4710-91d1-08469b7fe9c8'
+CAPSULE_IMAGE_GUID = '985F2937-7C2E-5E9A-8A5E-8E063312964B'
 # Windows cert GUID
 WIN_CERT_TYPE_EFI_GUID = '4aafd29d-68df-49ee-8aa9-347d375665a7'
 # Empty capsule GUIDs