adjust Unit_hipStreamCreate_MultistreamBasicFunctionalities size

Author: pvelesko

tests/catch/unit/stream/hipAPIStreamDisable.cc

@@ -19,7 +19,7 @@ THE SOFTWARE.
 #include <hip_test_common.hh>
 #include "hip/math_functions.h"
 
-#define NUM_STREAMS 8
+#define NUM_STREAMS 4
 
 namespace hipAPIStreamDisableTest {
 const int NN = 1 << 21;