Add initial support for SANITIZE and a simple test to generate this opcode.

test-tool/iscsi-test-cu.h

@@ -151,6 +151,8 @@ void test_reserve6_target_cold_reset(void);
 void test_reserve6_target_warm_reset(void);
 void test_reserve6_lun_reset(void);
 
+void test_sanitize_simple(void);
+
 void test_startstopunit_simple(void);
 void test_startstopunit_pwrcnd(void);
 void test_startstopunit_noloej(void);