For tests, rename ASSERT_ALLOC() to TEST_CALLOC_OR_FAIL()

Signed-off-by: Tom Cosgrove <tom.cosgrove@arm.com>
diff --git a/tests/suites/test_suite_x509parse.function b/tests/suites/test_suite_x509parse.function
index f702adf..da042cf 100644
--- a/tests/suites/test_suite_x509parse.function
+++ b/tests/suites/test_suite_x509parse.function
@@ -944,7 +944,7 @@
     c = buf + sizeof(buf);
     // Additional size required for trailing space
     out_size = strlen(expected_oids) + 2;
-    ASSERT_ALLOC(out, out_size);
+    TEST_CALLOC_OR_FAIL(out, out_size);
 
     TEST_EQUAL(mbedtls_x509_string_to_names(&names, name_str), 0);
 
@@ -979,7 +979,7 @@
     out = NULL;
 
     out_size = strlen(exp_dn_gets) + 1;
-    ASSERT_ALLOC(out, out_size);
+    TEST_CALLOC_OR_FAIL(out, out_size);
 
     TEST_LE_S(0, mbedtls_x509_dn_gets((char *) out, out_size, &parsed));
     TEST_EQUAL(strcmp((char *) out, exp_dn_gets), 0);