Test: fix secure test client partition

This change is necessary to execute test cases in the secure
test client partition in case of TFM_LVL==3:
 - rename files in test/framework folder, prefix was added
 - add missing files to test client partition in linker scripts
 - add execution region for secure test client partition in
   Musca A1 linker config file
 - update affected files due to renaming

Change-Id: If9605ad65daf4341d3e520ae69ba4d9d7f31415c
Signed-off-by: Tamas Ban <tamas.ban@arm.com>
diff --git a/test/framework/test_framework.h b/test/framework/test_framework.h
index 4716d43..a2b64c4 100644
--- a/test/framework/test_framework.h
+++ b/test/framework/test_framework.h
@@ -11,7 +11,7 @@
 #include <stdarg.h>
 #include <stdint.h>
 
-#include "helpers.h"
+#include "test_framework_helpers.h"
 
 #ifdef __cplusplus
 extern "C" {