DATACMNS-1755 - Use specialized assertThat*Exception.

When possible replace `assertThatExceptionOfType` calls with the
equivalent specialized variant.

Original pull request: #448.

src/test/java/org/springframework/data/util/LazyUnitTests.java

@@ -78,7 +78,7 @@ class LazyUnitTests {
 	@Test
 	void rejectsNullValueLookup() {
 
-		assertThatExceptionOfType(IllegalStateException.class) //
+		assertThatIllegalStateException() //
 				.isThrownBy(() -> Lazy.of(() -> null).get());
 	}
 

src/test/java/org/springframework/data/util/MethodInvocationRecorderUnitTests.java

@@ -37,7 +37,7 @@ class MethodInvocationRecorderUnitTests {
 	@Test // DATACMNS-1449
 	void rejectsFinalTypes() {
 
-		assertThatExceptionOfType(IllegalArgumentException.class) //
+		assertThatIllegalArgumentException() //
 				.isThrownBy(() -> MethodInvocationRecorder.forProxyOf(FinalType.class));
 	}