Build: Update the default version of tf-m-tests repo

Update default version of the test repo after modifying the build flag
of FWU secure test suites.

Change-Id: I52687427f8ac5562ed081d84711102d58a0a5366
Signed-off-by: Sherry Zhang <sherry.zhang2@arm.com>
diff --git a/config/config_default.cmake b/config/config_default.cmake
index 59911df..ca20403 100644
--- a/config/config_default.cmake
+++ b/config/config_default.cmake
@@ -171,7 +171,7 @@
 set(TFM_MBEDCRYPTO_PLATFORM_EXTRA_CONFIG_PATH "" CACHE PATH "Config to append to standard Mbed Crypto config, used by platforms to cnfigure feature support")
 
 set(TFM_TEST_REPO_PATH                  "DOWNLOAD"  CACHE PATH      "Path to TFM-TEST repo (or DOWNLOAD to fetch automatically")
-set(TFM_TEST_REPO_VERSION               "eeba9de"   CACHE STRING    "The version of tf-m-tests to use")
+set(TFM_TEST_REPO_VERSION               "a59fecd"   CACHE STRING    "The version of tf-m-tests to use")
 set(CMSIS_5_PATH                        "DOWNLOAD"  CACHE PATH      "Path to CMSIS_5 (or DOWNLOAD to fetch automatically")
 
 set(MCUBOOT_PATH                        "DOWNLOAD"  CACHE PATH      "Path to MCUboot (or DOWNLOAD to fetch automatically")